Eren Jaeger (Anime)

"I'll control the Titans. I'll plug up Wall Maria. I'll capture Reiner and make him pay. That's what I've gotta do to atone for all those lives lost."

- Eren resolves to make up for lost lives

Eren Jaeger (エレン・イェーガー) is a member of the Scout Regiment and the main protagonist of Attack on Titan. He is the only son of Grisha and Carla Jaeger, the adoptive brother of Mikasa Ackermann, and possesses the power to transform into a Titan.

He was born and raised in the Shiganshina District located on the southern edge of Wall Maria. He lived there until the year 845, when the Colossal and Armored Titans breached the Wall, allowing a flood of Titans to invade and destroy the city. During the incident, Eren witnessed his mother being murdered and eaten by a smiling Titan. This event aroused in Eren an intense hatred towards the Titans, and he swore to wipe all of them off the face of the earth.

Two years later, he along with Mikasa Ackermann and his best friend Armin Arlelt joined the 104th Cadet Corps. The three successfully graduated, with Eren ranking as the 5th best cadet, and they joined the Scout Regiment following the struggle for Trost.

Human Form
Eren is a young man of average height and build. He has a fairly long, yet rounded face, and sizable, expressive teal-green eyes. His eyebrows are sparse and often furrowed, making him seem troubled or annoyed. His hair is short and dark brown, with his bangs falling naturally into a middle-parted curtain-type style. His complexion also seems somewhat tan.

He is first seen wearing regular townsfolk attire, which consisted of brown trousers, a green shirt with string tassels at the collar, a maroon coat, and simple brown shoes. A few years before the fall of Wall Maria, he also wore a red scarf, which he gave to Mikasa the day they met. As a teenager, he is often seen in the typical Scout Regiment uniform when training. His casual attire consists of a long beige shirt (identical to that which he wore on his first appearance) worn with a maroon sash about his waist, brown trousers, and brown shoes. He always keeps the key given to him by his father dangling around his neck on a string.

Titan Form
As a Titan, Eren's appearance changes quite drastically. Along with a massive increase in height (to ), his hair grows long enough to graze his shoulders, with his tongue and ears becoming elongated. His facial features also undergo a transformation. Along with a prominent, hooked nose, his eyes are deeply sunken within their sockets, and his mouth takes on an unusual, jagged shape that is unsuited for intelligible speech, though he is capable of howling and roaring when expressing his exhaustion and anger. He also lacks lips and flesh on his cheeks, exposing all his teeth.

Similar to other intelligent Titans, Eren's Titan form is well-proportioned and physically fit, sporting a well-defined, lean, muscle appearance in lieu of the more common pot-bellied or emaciated appearance of regular Titans.

In its burning state seen when it lifted the boulder in Trost and when it fought the Female Titan, the Titan was deep black, had burning marks all over his Titan, and had sharp teeth instead of straight teeth.

Personality
Eren is best described as hardheaded, strong-willed, passionate and impulsive, which are both attributes of his strong determination to protect mankind and eventually escape the Walls. As a young child, he was so intent on joining the Scout Regiment that he argued with and shouted at his mother, referring to the people in the village as "silly" and compared them to complacent livestock.

As a child, Eren cared deeply for Armin, his best and only friend before he met his adoptive sister Mikasa, and most importantly his family, risking harm and even death in order to help them. This quality was most often demonstrated in the form of Eren taking on the larger boys who would bully Armin without hesitation; more tragically when he desperately attempted to lift the rubble crushing his mother during the Titans' assault in Shiganshina. In contrast, Eren is also capable of displaying very violent behavior in the defense of people he does not even know. This is highlighted when he brutally slaughtered two of the human traffickers who captured Mikasa in order to rescue her, despite the fact that they were total strangers at the time. Since witnessing his mother's gruesome demise and losing contact with his father, his fierce protectiveness to those he has left has only intensified.

Eren has a number of defining traits that date back to his childhood. He came to share his friend Armin's awe of the lands beyond the Walls after the latter showed him a book depicting the wonders of the outside world, and decided to see it all for himself. This led him to develop a scornful attitude to anyone content to live and die within the confines of the Walls without ever setting foot outside. This very contempt may have been the reason he did not easily make friends with his peers. He resented both the Walls that "caged" them in like cattle and the Titans that had driven humanity to erect them in the first place. As a result of this, he greatly admired the soldiers of the Scout Regiment, regarding them as "heroes", and wishing to join their ranks as soon as he became eligible for enrollment. He easily took offense when anyone spoke badly of the Scout Regiment, and his determination to join their ranks caused friction between himself and his mother, as well as to Mikasa.

Eren had a marked lack of self-restraint that often led him into trouble, causing both his friends and family to worry about him. His limited self-control extended to his temper, and as a result, it was short at best and murderous at the very worst. When sufficiently provoked, his anger could drive him into a frenzy, accompanied by horrific levels of violence. Like many children, he tended to view the world in terms of black-and-white, having great compassion for humanity and its plight, but deeming those individuals who deny others their freedom as worthless scum unfit to be left alive. He also had the habit of thinking with his heart rather than his head, even in situations where his own life was in danger.

These characteristic qualities have become more highly pronounced since his mother's death. He now focuses his destructive rage on the Titans, holding a virulent hatred for them, with the goal to one day rid the world of Titans. Fueled by vengeance, he vowed to personally wipe every single one of them out and restore mankind to its rightful place. Though he feels great remorse for quarreling with his mother till the very end, he still continues to go against her wishes by seeking entry to the Scout Regiment. So strong is his desire to exterminate the Titans, he was plunged into despair when it seemed he could not even master the basics of the omni-directional mobility gear during training when his failure was in fact due to faulty equipment. He is unafraid to voice his intentions of leaving the Walls to eliminate the Titans and is so consumed by his hatred that he seems not to fear them at all, earning him the nickname "suicidal bastard" from the other Trainees.

He possesses great amounts of selflessness, perseverance, fortitude, and a vigorous determination; managing to graduate fifth in his class despite his lack of natural talent. He greatly appreciates and/or admires his comrades, and will swiftly fly into a rage if one of them is injured or killed in front of him. He prizes human life, but his personal sense of justice dictates that anyone who steals away the freedom and dreams of others deserves to die. Though his ordeals since the struggle for Trost have taught him restraint, Eren still tends to behave quite rashly and speaks his mind even when he knows he should not. This has put him in grave danger on numerous occasions, and he often finds himself having to be rescued.

Eren, however, tends to lose confidence in himself when confronted with how he could do little to nothing in situations. This includes when Eren put his trust in the Special Operations Squad when he could have fought the Female Titan himself, resulting in the deaths of all of his squadmates save Levi.

Whilst assuming his Titan form, Eren seems to become more savage, bloodthirsty, and all-around uncontrollable. Though he is able to consciously control his Titan body after the struggle for Trost, he can very easily become caught up in the pleasure of slaughtering his enemies, indulging in thoughts so brutal he gives the impression of being insane.

Year 844
"I got rid of some dangerous animals! They just happened to look like people!"

- Eren commenting about Mikasa's kidnappers

Eren was born in Shiganshina District in the southern region of Wall Maria to Carla Jaeger and Grisha Jaeger. He had few friends, though his best friend was Armin Arlelt, who he often defended from the neighborhood bullies. Armin inspired his passion to leave the Walls and travel by showing him a hidden book about the outside world. He dreamed of joining the Scout Regiment as soon as he reached the enlistment age, in order to see the outside world. Because of this dream, Eren and Armin were regarded as heretics and harassed.

When Eren was nine years old, he saved Mikasa Ackermann from being sold into slavery by human traffickers. On a visit to the Ackermanns' home, he and his father discovered both parents murdered and their daughter missing. Fearing the worst, Dr. Jaeger instructed Eren to stay within the house while he fetched the Military Police Regiment. However, Eren, wanting to rescue the missing girl as soon as possible, managed to track the kidnappers' trail to a small cabin in the forest behind the house.

Opening the door to the room where Mikasa was being held captive, he found her laying on the floor with two of the kidnappers keeping watch. Feigning distress and saying that he was lost, he got them to drop their guard.

As one of them closed in to pat his head, Eren slit his throat with a knife he had hidden behind his back and quickly ducked back out of the room. As the second man went after him with an axe Eren charged him with a makeshift spear, piercing him in the shoulder. Once he was down, Eren proceeded to stab him to death in a wild frenzy while Mikasa looked on in horror.

As Eren untied her in the aftermath, he was caught off-guard by the third kidnapper, who proceeded to strangle him. Mikasa picked up the knife Eren used but balked at the thought of using it to kill someone. Eren urged her to fight back, warning her that they would both be killed if she did nothing. As Eren began to lose consciousness, Mikasa finally lost all inhibition and lunged at their attacker, stabbing him through the heart and killing him instantly. When Dr. Jaeger eventually returned with the police in tow, he took Eren aside scolded him angrily for his reckless behavior. While Eren was genuinely sorry for upsetting his father, he expressed no remorse whatsoever for killing the kidnappers. When Mikasa remarked that she was cold, Eren gave her the scarf from his own neck; and when Dr. Jaeger invited Mikasa to live with their family from then on, Eren accepted her with no hesitation, tugging on her sleeve and shyly insisting that they return home.

The Fall of Shiganshina arc
In the year 845, Eren lives with his adoptive sister Mikasa, his mother Carla, and his father Grisha in Shiganshina District. After waking up from a nightmare interrupted by Mikasa they stroll through the city and Eren expresses anger in being kept like cattle within the Walls, and reveals his intentions in joining the Scout Regiment. Mikasa scolds him, not taking his words seriously, and later reveals what he said to their parents. Eren berates Mikasa for revealing this, but Carla is frightened, shocked and angered, expressing that the Scout Regiment has a high body count and that she will not let him join. She asks him why he wants to and he says that he wants to visit the outside world one day and is tired of living within the Walls like cattle. She begs her husband Grisha to talk some sense into his son, but Grisha says that nothing can hold back a human's curiosity. Grisha says that he will be leaving for a few days on a trip and that when he comes back, he will show Eren what he has hidden in the basement of their home. Enthralled, Eren joins his mother and Mikasa in waving him off. Carla reminds him that she will not allow him to join the Scout Regiment, and they exchange a heated but short-lived argument before he bolts off. Carla turns to Mikasa and begs her to look after him.

Eren, attempting to scare off bullies harassing their neighborhood friend Armin Arlelt, initially believes he is the one who scared them away when in fact it was Mikasa. He offers Armin a hand but Armin rejects, expressing discontent with his abilities to protect himself and admits he is weak. The three stroll through Shiganshina and settle by the riverbank, where Eren reveals his intentions in joining the Scout Regiment to Armin. Armin then contemplates who really believes staying in the Walls will protect them forever, and that they could be breached at any time.

Suddenly lightning strikes and the ground shakes. The civilians gather around the center of town and look up to the sight of a giant hand grasping the top of the Wall. Eren catches up with Armin and Mikasa and they all gawk in horror at the sight. The Colossal Titan kicks a hole through Wall Maria's gate, sending massive pieces of debris throughout the town. This forces Eren and Mikasa to search through the panic-stricken town to find their own home. Eren repeats to himself that his home will be there like it always has been, but when they reach the corner, they find his house crushed by a large rock and his mother is trapped beneath the rubble. She says that the rubble crushed her legs and she can not move, but Eren insists that he will carry her to safety. She yells at him to run and save himself and Mikasa, saying he never listens to her. Just then, a Titan approaches the leveled house, targeting Carla. The Garrison member, Hannes, arrives right in time, and Carla begs that he takes the kids and run. Wanting to repay Dr. Jaeger for all he has helped the village with, Hannes attempts to kill the Titan and save Carla, but the massive height and frightening appearance of the Titan forces him to take Eren and Mikasa and leave Carla behind. As Hannes carries the two on his shoulders and runs the other way, Carla begs for her children to survive and silently cries for their return, however, it is too late. Eren witnesses as the Titan lifts Carla up, breaks her back, and eats her alive, with a loud crunch.

As the evacuation of Shiganshina is underway, Eren, Mikasa, and Hannes arrive in an alley and Eren starts attacking Hannes, crying and asking why he did not save her. Hannes says that the reason Eren could not save her was that even though he had the courage, he lacked the strength, and Hannes himself lacked the courage even though he had the strength.

Hannes leaves Eren and Mikasa on the boat leaving the Titan-infested city. There, Eren and Mikasa witness an Armored Titan destroy the back gate of Shiganshina. Eren, Armin, and Mikasa are forced to depart on the boat as Eren realizes that he can never return home, and vows to kill every Titan in existence.

Humanity's Comeback arc
After the fall of Wall Maria, Eren, Mikasa, and Armin briefly stay in a landfill working on a farm before reaching the proper age to enroll in the military. After these two years, they begin their first day on the training grounds in the 104th Cadet Corps as instructor Keith Sadies grills the fresh recruits as part of their "Rite of Passage". Eren restores his vow to kill all Titans, and that next time around, they will be the ones who will be devoured.

Before training, Eren draws a crowd of cadets at dinnertime and upon questioning, describes the appearance of the Colossal and Armored Titans. He becomes sick as he remembers his mother being eaten, at which point Marco suggests they no longer question Eren about things he would rather not bring back. However, Eren attributes this to eagerness to begin his training and kill all the Titans with the Scout Regiment. Jean Kirschtein interrupts Eren and mocks his decision. Eren does not admire Jean's desire to join the Military Police simply to live in the interior Walls and the two prepare to fight each other. The bell signaling the end of dinner rings breaking the tension and the two drop their disagreement with each other.

The next day, the cadets begin practicing with omni-directional mobility gear, with their first task to balance themselves on their belts. Unlike the other recruits, Eren utterly fails to keep himself upright and takes extra tutoring from Armin and Mikasa. He knocks himself out and at dinner, other cadets mock his performance especially after his pledge to kill all Titans.

Back at the dorm, Conny and Jean do not offer any suggestions and Eren visits Reiner Braun and Bertholdt Hoover for help. Although they are reluctant at first, the group exchange their stories of how they first encountered the Titans. The three exchange tips and later, depart as friends.

Eren is back at the practice rigging as Sadies lets him try to balance himself on ODM gear one last time before he will be shipped to the landfills. At first, it appears Eren can maintain his balance and his peers begin cheering, but just as quickly, Eren flips upside down. Sadies has him put back on the ground and after a few moments of contemplation has Eren switch equipment with Thomas Wagner. Eren easily keeps his balance and Sadies reveals his equipment was defective, impressing everyone with his feat of keeping his balance, even for a while, with the broken equipment. Sadies mentally notes to Eren's father, Grisha Jaeger, that his son is finally becoming a soldier.

A Sudden Visitor: The Torturous Curse of Adolescence
Sometime later in the same year, Eren and Mikasa confusedly watch a brewing fight between Sasha and Jean. Afterwards, he attempts to unload a crate from a wagon but was unable to due to its weight. Meanwhile, he looks over at Mikasa, who is carrying three without any trouble. She offers to help him with his, but he angrily refuses. Later in the dining hall, Eren advises Jean to be nicer to his mother.

Distress
In the year 848, two years before graduation, Eren and his fellow trainees embark on a navigation training exercise to learn how to sustain themselves in times of peace, during which he and Jean continually get at each other's throats.

Halfway through the exercise, Christa Lenz is kidnapped by thieves and Eren assists in rescuing her, leading to the criminals' arrest. Afterwards, he is seen with Marco as they contemplate which military branch they will join.

The Struggle for Trost arc
In 850, the 104th Cadet Corps is undergoing a fitness assessment supervised by Instructor Sadies. The instructor notes that Eren's grades have improved with his unparalleled effort and that he possesses twice the sense of purpose than anyone else. Later, the cadets are practicing hand-to-hand combat as Eren disarms Reiner. As they switch roles, Eren remarks on the uselessness of learning anti-human combat as well as attacking an armed foe bare-handed, remembering the day he killed the kidnappers in.

Reiner spots Annie Leonhart avoiding practice and to show her up, has her try to disarm Eren. When Eren lunges at her, she swiftly kicks his foot out from under him and drops him on his head with a few moves. Eren praises her technique, but Annie believes this training is pointless as it is not a factor in their rankings. She points out the hypocrisy of having the top 10 graduates, the most effective Titan fighters, be the only ones eligible to join the Military Police and live in the safest human territory. As the cadets are eating dinner, Eren is hears Jean's discussion with Marco on the efficient use of gas in the omni-directional gear and how such an advanced technique would allow him to be ranked higher and join the Military Police. Eren insults Jean's shallow reasoning in wanting to join the Military Police and the two almost come to blows. Jean grabs Eren and tries to punch him, and Eren gets ready to retaliate, he notices Reiner and Annie closely watching the situation and, using Annie's disarmament technique, quickly ends the fight to resolve the situation. Eren tells Jean he learned that combat technique while Jean was not taking training seriously and that how could he call himself a soldier if a carefree life is his idea of the real world. The graduation of the cadets draws closer until finally, Eren graduates in the top 10 of the 104th Cadet Corps, along with Mikasa, Reiner, Bertholdt, Annie, Jean, Conny, Sasha, Marco, and Christa. After graduation, he is assigned to clean the cannons atop Wall Rose with Sasha, Conny, and a few others. There they witness the return of the Colossal Titan, who has not been seen in the last five years.

Driven by his desire for vengeance, Eren faces the Titan alone in combat as his fellow cadets, paralyzed with fear, could only look on. Despite getting close enough to the Titan to nearly slice the nape of its neck, it vanishes into thin air after kicking down Trost's outer gate and dismantling the cannons atop the Wall. The Garrison are forced to implement the Colossal Titan contingency plan, placing Eren and his squad as part of the middle guard in the defense of Trost.

In response to the crisis, the new recruits were split into squads in charge of defending different parts of the city. Eren is grouped with Armin. Enraged upon seeing Thomas devoured by a Titan, Eren leaps into battle after the Titan, only to have his leg bitten off below the knee, incapacitating him. The rest of his group join the fight, but are also killed by Titans. Just as Armin is about to get eaten, Eren pulls his friend out of a bearded Titan's mouth, switching places with him. Eren is swallowed, his left arm being severed as the Titan bites down on him. In the stomach of the Bearded Titan, Eren came across the dead or dying soldiers who were devoured by the Titan, one calling out for her mother before sinking inside stomach acid. Upon this, he remembers his goal to kill every last Titan alive. He thrusts his severed limb up in frustration, getting more and more desperate. Suddenly, a Titan's arm bursts from the bearded Titan's throat and Eren steps out from its carcass, transformed into a Titan himself. He then proceeds to wreak havoc on all the Titans he could get his hands on. In the process, he unknowingly saves Mikasa’s life from another Titan and is baited by Armin, Conny, and Mikasa to help fend off a procession of Titans from a storage headquarters for the compressed gas used to power their ODM gear.

Eventually, Eren appears to run out of energy and begins to be overwhelmed by the Titans. Before Mikasa’s group could intervene, the Titan that killed Thomas appears, driving Eren to throw off the Titans holding him down and kill the Titan by biting its nape off. As soon as the massacre is over, Eren falls to the ground and his human form emerges from the back of his Titan form’s neck (with both lost limbs back) to the shock of all the onlookers. He is retrieved by an overwhelmed Mikasa.

When he regained consciousness, Eren seems to only have a faint dream-like memory of his time as a Titan and finds himself cornered by a hostile military force under the command of Kitz Woermann. After witnessing him emerging from a Titan, they had concluded that he was an enemy of humanity and intended to kill him, with only Mikasa and Armin standing on his side. They fire a cannon at the three of them and Eren instinctively grabs onto his two friends and bites his own hand, partially transforming into a Titan and blocking the cannon ball with the Titan's hand. In the moments while the cannon was being reloaded, Eren asks Armin to try and talk them out of the situation. This is met with limited success until Commander Dot Pyxis intervenes and orders Woermann to stand down.

A plan is made for Eren to use his Titan form to move a huge boulder near the gate which they had placed to reseal Trost's gate in the event of a Titan incursion but had been unable to move with their limited resources in the aftermath of the Titan assault. Eren is assigned to a team, which included Mikasa, to defend him while he carries the boulder. Upon his transformation, however, he attacks Mikasa. Eren ends up wounding himself and his body fails to regenerate, and the mission is declared a failure. Despite this, Ian Dietrich, the leader of the group, decides they must stay and guard Eren.

Armin arrives on the scene and convinces Mikasa to go help fend off the Titans while he tries to get through to Eren by stabbing his human form through his Titan's nape. Eventually, he is able to do so, reminding Eren that they wanted to see the world together, which caused Eren to remember why he wanted to join the Scout Regiment, wipe out all the Titans, and claim the world as his birthright. Eren carries the boulder and with the sacrifice of most of the remaining team members (with the exception of Rico, Armin, and Mikasa), is able to plug the hole in the Wall. Before they could bring Eren to safety, however, Eren and his group were attacked from behind by two Titans. They were saved by the timely arrival of Captain Levi, who had arrived ahead of the returning Scout Regiment.

Eve of the Counterattack arc
After the events of Trost, Eren is placed in the custody of the Military Police and kept chained in a dungeon prison cell in the Royal Capital beneath a courtroom. While he is there, he is paid a visit by Commander Erwin Smith and Captain Levi. Upon hearing his motive to kill Titans, Levi says he will accept him into the Scout Regiment. Eren is left there for some time before being escorted by Scout Regiment members to the courtroom where he was tried, with Premier Dhalis Zachary preceding over events.

During his trial, the Military Police and Church of the Walls called for his dissection and execution while the opposing side, the Scout Regiment, argued in favor of using his power to their advantage in scouting missions. After an outburst by Eren, Levi beats him senseless, accrediting his dominance over Eren’s threat and it is decided his fate will be decided after a “test” mission with the Scout Regiment. Afterwards, Erwin thanks him for his cooperation.

The 57th Exterior Scouting Mission arc
After joining the Scout Regiment, Eren is assigned to Levi's Special Operations Squad and sent to an abandoned castle which had formerly served as the base of operations for the Scout Regiment. While there, he is tasked with cleaning duty by Levi while also helping Squad Leader Hange Zoë with her Titan experiments.

During one of the experiments with his Titan abilities, Eren was lowered into a well before being told to transform into a Titan, in case he lost control. However, no matter how hard he tried, Eren was unable to activate his Titan abilities. He was eventually brought back to the surface and tended to his self-inflicted wound on his hand with Levi's squad, who expressed their relief at his inability to turn into a Titan. However, whilst bending over to pick up a dropped spoon with his injured hand, Eren accidentally triggered his Titan ability in a partial transformation, creating a Titan hand in a small explosion.

Expressing fear and disbelief at the sudden usage of his Titan powers, Levi's squad surrounded Eren, demanding that he prove he was not a threat to them. The tense situation was defused with the help of Levi and Hange, and after learning that Eren's transformation was unintentional, bit their own hands as way of apologizing for their overreaction. After this incident, with the help of Hange's deductions, Eren learnt that a Titan transformation required him to have a clear goal in mind in addition to self-injury.

While he was with Levi's squad, Eren met some of his classmates from the 104th Cadet Corps who had opted to join the Scout Regiment. which included Mikasa, Armin, Conny, Sasha, Reiner, Bertholdt, and to Eren's surprise, Jean. He learned of Marco's death from them and was later given a lecture by Jean about his responsibilities to humanity.

After a month of training, Eren and the Scout Regiment embark on the 57th Exterior Scouting Mission. After leaving the safety of the Walls, the Scouts assume the Long-Distance Enemy Scouting Formation, an extensive formation created by Commander Erwin, which aims to maximum the visibility of the scouting group in order to detect and avoid fighting Titans whenever possible. Eren was positioned at the center of the formation, where it is the safest. However, as per Commander Erwin's orders, the knowledge of Eren's location within the formation was known only to a select few, with the fresh recruits being given false information in order to misdirect any spies within their midst.

It soon became apparent to Eren that something was going wrong with the expedition. First, he received the news of the decimation of the right wing of the formation. Then, he noticed black flares, which signaled the presence of an Abnormal Titan in close proximity to his location, even though he was supposed to be in the safest position in the formation. Soon after, the Scouts head toward a Forest of Giant Trees. The central column of the scouting force, including Eren and Levi's squad, were told to enter the forest, while the rest of the soldiers were to stand guard at the perimeter of the forest to prevent any Titans from entering.

Soon after entering the forest, Squad Levi was set upon by a seemingly intelligent Female Titan, who was able to dispatch pursuing soldiers with ease. Seeing the soldiers perish one by one, Eren is tempted to use his Titan power to fight the Female Titan and save his comrades. Levi allows this choice, but recalling Levi and his squad's trust in him when he accidentally used his Titan powers, Eren decides to trust in his team, sacrificing the last remaining member of the rear guard.

This opened the way for the Female Titan to focus completely on Levi's squad, and she was inches from grabbing Eren before being ambushed and captured herself. Eren and the rest of his team excluding Levi ride out of the forest firm in the belief that the Titan was captured and her human self apprehended. This is proved false as the unidentifiable human form of the Female Titan kills Gunther before re-transforming into a Titan. The remaining three team members tell Eren to go on while they attack the Female Titan. Eren expressed his desire to stay and fight with them, but again, is convinced otherwise and begins to retreat. Although the three soldiers manage to blind the Female Titan and cripple her arms, they were caught off guard when the Female Titan regenerates an eye much faster than they had expected, resulting in their deaths. Upon seeing this, Eren, filled with regret, finally transforms into a Titan and engages the Female Titan.

Even though he initially had the upper hand against the crippled Female Titan, Eren, blinded with rage, quickly spent all of his energy and ultimately loses the fight. His human form was eaten by the Female Titan just as Mikasa arrived on the scene. She pursued the Female Titan, but was unsuccessful in rescuing Eren. It was only after she was joined by Levi that they were able to incapacitate the Female Titan and retrieve Eren, still alive, from its mouth. The Scout Regiment returned to Wall Rose in defeat, with the failure of the mission to capture the Female Titan and the loss of the lives of many soldiers. Due to the mission's failure, Eren was to be handed over to the Military in Wall Sina.

Assault on Stohess arc
Before Eren can be handed over to the Military, he is let in on a plan by Commander Erwin to capture the Female Titan, whom Armin deduced to be actually Annie Leonhart of the 104th, who has joined the Military Police Brigade after graduation. At this realization, Eren is initially shocked and angry at her accusation, refusing to believe that such a betrayal by one of his fellow cadets, whom he had trained with for 3 years, is possible. However, after Mikasa tells him to think back to when he was fighting against the Female Titan in the forest, he realized in astonishment that the fighting style the Female Titan exhibited was exactly the same as Annie's, forcing him to come to terms with Annie's betrayal, and he agreed to participate in the plan to capture her.

After Armin convinced Annie to join them in escorting Eren out of the city, they led her to the entrance to an underground tunnel, where she refused to continue following them, despite Eren's continued pleas for her to join them and prove her innocence. When Annie's capture failed and she transformed, he, Mikasa, and Armin were forced into the underground tunnel to escape from her Titan. As per the plan, Eren tried to go into Titan form by injuring himself but could not because of shock and disbelief at Annie's betrayal, and his friendship with Annie making him unwilling to fight her. As the Scout Regiment tries in vain to capture the Female Titan, Eren is reminded of the lives Annie took as the Female Titan as well as his vow to exterminate the Titans, allowing him to finally overcame his inhibitions, transform into his Titan form, and engage the Female Titan for the second time.

Even though Eren is in better control of his Titan and is equipped with knowledge of his opponent this time round, he is ultimately no match for Annie's superior fighting technique and hardening ability. He manages to throw Annie into some buildings, but gets his right leg taken off by a hardened kick from Annie, who proceeds to slam him into a building and pummel his head repeatedly with her hardened fist.

Unexpectedly, Annie stops her assault on Eren and flees toward the wall, giving him the opportunity to drive himself into a rage, giving his Titan form renewed strength and energy and the appearance of his veins being on fire. He chased after the Female Titan and grabbed her by the face, but she was able to kick him aside and attempt to climb up the Wall with her hardened fingers. Undeterred, Eren grabs hold of one of her legs, but is kicked off by Annie, severing the leg in the process. Mikasa then slices the Female Titan's fingers off, causing her to fall back to the ground, where she is set upon by Eren. He tears her head off and bites her nape clean off of her body, exposing Annie's human form inside.

Clash of the Titans arc
When Wall Rose is supposedly breached, Eren makes his way to Utgard Castle under squad leader Hange to save his comrades stranded there. Eren and the rest of the scouts arrive just in time to save their comrades, excluding the members of squad Miche who had already died. when they arrive Eren kills a 7 meter Titan and celebrates his first kill as a scout in human form, before tripping and being scolded for endangering himself. He then goes on to meet with his fellow recruits.

In the aftermath, Eren is among the soldiers on top of the Wall recovering from the ordeal at Utgard. Eren asks about Reiner's condition due to his injured arm and listens to him talk about the times he has nearly died. Bertholdt then reassures Reiner that they do not have much left to do and can return home soon. Hannes then arrives with news that the Wall has not been breached, prompting Hange to order them to move to Trost District. Reiner then asks to speak with Eren and reveals that five years ago, he and Bertholdt breached the Wall and are the true identities of the Armored and Colossal Titans, going on to say that their objective was to wipe out all the humans living in the Walls, but that if Eren comes with them to their hometown they will not attack the Wall again. Eren briefly remembers a discussion the previous night with Hange, who discussed Reiner and Bertholdt potentially being accomplices to Annie. Armin slowly puts together that Reiner attempted to usher Eren's potential location out of him during the 57th exterior scouting mission, and then cut the information into Annie's palm when she grabbed him. Hange warns the three to act carefully around Reiner and Bertholdt, and tells them not to mention anything to do with Annie or their suspicions. In the present, Eren tries to persuade Reiner to believe that he is tired and not thinking straight. Bertholdt plays along, and Eren says that even if the two are responsible for the mass murder of humankind, they could not expect him to go with them willingly. This surprises Reiner and he admits that he must have gone mad, but then claims that he has been surrounded by fools for too long. He then explains that he no longer knows what is right or wrong, but what he does know is that he must complete his mission. Reiner removes the bandage on his arm and reveals the rapidly healing wound, discharging steam. He moves in to take Eren by at that moment, Mikasa attacks them, chopping off Reiner's hand and through his arm while nearly decapitating Bertholdt. Reiner tackles Mikasa and prevents her from killing Bertholdt and then arises beside his friend, bloodied, and the two transform. This throws the soldiers back, with Reiner grabbing Eren and Bertholdt taking the injured Ymir. Eren reminisces about the times they spent together, then bites his hand to transform and fight.

After Eren gains the upper hand on Reiner, Reiner begins pushing himself and Eren along the Wall before Mikasa swings in and slices through Reiner's now vulnerable legs, weakening him. He suddenly opens his mouth and roars. When no Titans come, Armin wonders what the roar was for and looks up at the Colossal Titan.

Atop the wall, Conny and the others also contemplate Reiner's roar. As Conny looks at the Colossal Titan whose hands and face have withered to bone, he begins to shout. The Colossal Titan's ribs break and it falls over the wall, head first straight into Eren and Reiner. The impact is so immense that some soldiers are flung over the Wall. Armin attempts looks for Eren in the dust of the impact before suddenly spotting the Armored Titan running away with Bertholdt and an unconscious Eren.

Later the same day, Eren wakes up again to find he is missing both his arms. He then sees Reiner and Bertholdt back in human form as well as Ymir who has lost her leg and arm. After questioning Reiner and Bertholdt as well as Ymir, Eren begins to shout at them calling them 'murderers' and says that he will find the most painful and horrid way for them to die. In the distance however, Reiner and Bertholdt spot the distinct green and red flares of the Scout Regiment approaching them.

After contemplating when they are going to leave, Eren questions Ymir about who the real enemy to which she replies "Who knows?" Reiner then states that they must immediately leave and warns Eren not to resist. Eren, telling Reiner that there is no way he can resist, stands back and runs at Reiner, pushing him over and repeatedly hitting him in the face with one of his stumps. While Bertholdt and Ymir talk, Eren is overpowered by Reiner and is eventually knocked out.

After Ymir transforms into a Titan and retrieves Historia, she escapes and jumps onto Reiner who has now transformed into his own Titan form. The two run away along with Bertholdt and an unconscious Eren strapped to him.

After Erwin notices the Armored Titan running away, he orders the soldiers to pursue him, and let any Titans follow them. The Armored Titan uses his hands to protect Bertholdt and stop Eren from being retrieved by Mikasa. After Conny, Jean and Sasha try persuading Bertholdt to give up, Hannes warns them of a large group of Titans advancing straight towards them, being led by Erwin and a large force of soldiers.

The Armored Titan is quickly overwhelmed by them and Eren shortly wakes up. He begins pushing Bertholdt against Reiner's hand in a futile attempt to escape. In an attempt to free himself, the Armored Titan removes his hands, exposing both Eren and Bertholdt so he can punch his way out of the pile of Titans. This gives Mikasa the opportunity to attack Bertholdt and try to free Eren. As she rushes forward, Bertholdt dodges and Eren tries to warn Mikasa of a Titan behind her. It squeezes her hard enough to crush her ribs, but Jean frees her before she can be eaten.

Armin lands on the Armored Titan and tells Bertholdt and Reiner that Annie is being tortured and the two of them are about to leave her behind. This is enough to distract Bertholdt so that he is unprepared for Erwin's approach.

Erwin grapples up with one arm and slashes at Bertholdt's chest, freeing Eren. Mikasa then grabs him before landing on their horses. As they flee, a large Titan is sent flying and creates a large explosion of dust. This causes some soldiers to fall off their horses including Eren and Mikasa. In the fog, they see the barely visible body of a very tall Titan slowing advancing toward them. Eren widens his eyes as he recognizes this is the exact same Titan that ate his mother.

Hannes steps forward to protect Eren and Mikasa. While he distracts the Titan, Eren shouts for Mikasa to free him, believing that he is the only one who can stop this now. But when he tries to transform into a Titan, nothing happens because he is still recovering from his injuries.

He is devastated when Hannes gets eaten, finding himself just as powerless now as he had been when his mother died. Mikasa reassures him about the value of his life and how much he has meant to her. This fills Eren with rage and sadness. He stands up and punches the Smiling Titan in the hand as it reaches for him. Eren screams and another Titan attacks the Smiling Titan. Elsewhere around them, the Titans that were fighting the Scouts turn and start running to the Smiling Titan, surrounding and devouring it. Eren takes advantage of the situation and flees, carrying Mikasa on his back. When Reiner and Bertholdt pursue him, he screams again, and the Titans turn to attack them. Eren escapes with the rest of the surviving soldiers and they return to Trost District where he learns that the Scout Regiment lost more than half its veteran soldiers in rescuing him. No casualties were incurred on the way back, and Armin and Jean theorize that it is because Eren was somehow able to control them. Eren resolves to learn how to control the Titans, seal Wall Maria, and make Reiner pay as a way to atone for all the lives lost.

Some time afterwards, Eren and Historia are sent away with the new Squad Levi to be safeguarded in an isolated cabin in the forest. Eren frantically attempts to clean their hideout before Levi's arrival, scolding Jean for the lackluster cleaning on his part. When Levi arrives, he is dissatisfied with their cleaning, much to Eren's dismay.

Martial Arts
Originally, Eren's only noteworthy trait was his natural physical strength, which stemmed from having to defend his friend Armin from bullies who were bigger and stronger. As he grew and joined the 104th squad, he trained extensively in hand-to-hand combat. While hand-to-hand fighting would appear useless due to the massive physical differences between humans and Titans, these skills gave Eren a powerful edge when fighting other Titans in his own Titan form.

Omni-Directional Mobility Gear
At first, it is shown that Eren is not very skilled with the ODM gear. During the initial balancing tests, he kept tripping and smacking his head on the floor. People mocked him for this. Eren pleaded for help from everyone but the only advice they could give Eren was that he needed to clear his mind and focus. On his last attempt, Eren did just that and stayed upright for a short period of time before tipping over and hitting his head. Seeing this, the instructor, Keith Sadies told Thomas Wagner to swap equipment with Eren and for Eren to try again. Eren did so and balanced with ease. The instructor then told Eren that his equipment was damaged and that it was a miracle that he managed to stay upright at all. He is not shown using the equipment much but was able to hold his own against the Colossal Titan for a short period of time until the Titan disappeared.

Power of the Titans
During the first Battle of Trost, Eren was swallowed whole by a Titan, and inside the stomach-like cavity saw other fellow recruits lying dead/dying, one wanting her mother before sinking in stomach acid. This sight combined with intense feelings of desperation and his drive to exterminate all Titans awoke his ability to transform into a Titan. In this form, he is a 15 meter tall Titan, with shoulder-length black hair, pointed ears, a long nose, and a gaping, skeleton-like maw lacking lips. Unlike most other Titans, Eren's Titan form is considerably more muscular and defined; making him much stronger than even similar-sized Titans while his intelligence and military training, allow him to out-maneuver and dispatch entire groups of Titans with ease. A transformation takes a heavy toll on Eren’s body and requires large amounts of stamina. As a result, he has displayed several symptoms when he over-exerts himself such as a nosebleed, pale skin, and labored breathing. In some cases, Eren is rendered unconscious for a short period of time after a Titan transformation.

Initially, Eren has no control over his actions when he first transforms into a Titan and is unable to remember any actions that occurred during the first Battle of Trost. He is in a “dream-like state” and fails to remember how to transform in the first place. However, Eren recalls fragmented memories of his father by seeing the key to the basement of his old home and is able to successfully transform to protect Armin and Mikasa from certain death. It has been shown that with more transformations, Eren retains more of is intelligence being able to form rational thoughts. At the beginning, during the second Battle of Trost, Eren in his Titan form attacks Mikasa but ultimately plugs the hole in Trost's gate after Armin forces him to wake up. His Titan form, combined with his growing experience and his hand-to-hand combat skills, allowed him to kill over 20 Titans in his first transformation.

Eren, like all others with the power of the Titans, must physically harm himself in order to transform into his Titan form. However, lack of a determined goal and resolution for it inhibit his ability to transform as shown when he cannot transform at first to confront Annie Leonhart. Within Titan transformations, he has displayed the ability to partially transform, as shown when he protected Mikasa and Armin from a cannonball by forming the upper torso skeleton, complete with arms and a skull with some muscle tissue. From his suppressed memories, Eren believes that the full truth of his Titan powers, as well as a way to defeat the Titans once and for all, is located in the basement beneath the ruins of his family home.


 * Regeneration: Eren’s Titan form has demonstrated the ability to automatically heal any injury sustained in battle and also to regenerate entire limbs. Unlike Annie Leonhart, Eren has not shown the advanced ability to focus regeneration to one wounded area of his Titan form. His healing factor was fast enough to heal an entire lost hand in mere seconds to an entire arm in minutes. This ability is useful to Eren as, when he fights, he often loses entire limbs in his Titan form. While in his human state, Eren can also regenerate entire lost limbs, as seen after he lost his arm and leg to a Titan, he regrew them.


 * Enhanced Strength: As a result of Eren’s Titan form being much more muscular than other Titans, he is much stronger in terms of physical strength. During his first transformation, Eren was able to decapitate a 15m Titan with a single punch and kill a 7m Titan with little effort. With both arms lost, he was also strong enough to bite into the neck of a large, abnormal Titan that ate Thomas and lift it up above his head. With enough force, Eren was able to throw the abnormal into another Titan hard enough to knock them both into a building. Against the Female Titan in the Titan Forest, Eren’s Titan form had enough physical force to leave large craters in the ground, as well as lift the Female Titan into the air with a punch. Ultimately, Eren’s greatest display of strength was when he lifted a giant boulder, albeit with difficulty, carry it across a large distance, and slam it down to seal the hole in Trost's gate, producing a large shock wave.


 * Enhanced Endurance: Perhaps Eren's most notable trait of all is his ability to maintain levels of activity for an extended period of time. Eren’s first transformation carried on long enough to incapacitate 20 Titans in total. In battle, even after receiving massive amounts of damage from the Female Titan, Eren can carry on fighting, despite the handicaps that he suffers. He was also able to fight against the Armored Titan for a period of time and gain the upper hand. Eren’s endurance in his Titan form was enough to allow him to sustain the effort of hoisting a huge rock on his back, carry it over a large distance, and seal the hole in Trost's gate shortly before collapsing.
 * Coordinate Power: Named the Coordinate by Bertholdt Hoover and Reiner Braun, this ability is the power to control Titans. Eren demonstrated this ability by punching the Smiling Titan. Somehow, this commanded the Titans in his surroundings to eat the Smiling Titan. This ability was sought after by the group of Reiner, Bertholdt, Annie, and Marcel for unknown reasons.

Relationships

 * Mikasa Ackermann - Eren has a complex relationship with his adoptive sister. He often displays a brusque, casual attitude with her, which belies their deep bond and care for each other. While Mikasa is more open with showing concern for him, Eren only does so when she is injured or in distress. Despite his blunt exterior, he is always looking out for her, and will not hesitate to comfort or reassure her when he senses that she needs him to. He would even go as far as to call himself a monster to ensure that she would not be targeted by the prosecution. Like typical siblings, they do not always agree, but Eren will usually not stop Mikasa from doing what she wants, so long as it is within reason. He also seems to harbor somewhat of an inferiority complex towards her, due to her outstripping him in both strength and battle skill. This is further compounded by her desire to constantly keep tabs on him and keep him out of trouble - a habit he generally views as annoying. At times, he feels so stifled by her protectiveness that he openly lashes out at her, telling her not treat him like her "little brother". When they meet the Smiling Titan again, and Eren is desperate because Hannes dies and he can not help or turn into a Titan, he listens to Mikasa who thanks him for what he did to her. This gave Eren the strength to get up, and he said he would wrap the red scarf around her as much as she wanted.
 * Armin Arlelt - Armin is Eren's closest friend, who inspired him to dream of the world beyond the Walls (and in doing so, became partially responsible for motivating him to join the Scout Regiment). During their childhood, they were snubbed by other children as well as adults for their "heretical" ideas. Armin himself is frequently targeted by bullies, whom Eren (sometimes with Mikasa in tow) would constantly try to fend off. This pattern would continue into their teenage years, with Eren leaping into action to save Armin from danger, not caring if he himself is harmed in the process; the most memorable occasion being the day Eren snatched Armin from a Titan's jaws and got swallowed in his place. Despite Armin considering himself as burdensome, Eren greatly appreciates his quick-wittiness and brilliant judgment (it also did not miss him that Armin's quick thinking had saved his and Mikasa's lives in 845). Eren's confidence in Armin is so great that he would entrust him with his life with no hesitation if asked to do so.
 * Jean Kirschtein - As Eren's main rival, his temperament is the very antithesis of Eren's. Where Eren is hotheaded, he is collected; and Jean is pessimistically pragmatic as Eren is idealistic. Jean believed anyone who wished to join the Scout Regiment was a suicidal fool, while Eren regarded those who looked down on the people who wanted to fight the Titans with contempt. Initially, they were able to resolve their differences in a civil manner despite starting off on the wrong foot. However, this friendliness was short-lived, as Jean became jealous when he saw how familiar Eren was with Mikasa. A fierce rivalry soon budded between them, with the two constantly provoking each other and getting into fistfights. In addition to insulting Jean to his face, Eren also seems to be fond of saying Jean has a "horse-face" behind his back. In the wake of the Battle of Trost however, Eren and Jean seem to have set their differences aside and stopped antagonizing each other. Though they still quarrel as much as before, their animosity has noticeably lessened.
 * Levi - As humanity's most formidable soldier and Eren's superior officer, Levi commands great respect and admiration from him. Eren bore no grudge against Levi for brutally beating him before the entire court during his trial, recognizing that it had been a necessary measure to secure his life (though he did still flinch the next time Levi sat down next to him and becomes very stressed in situations that could result in physical punishment). Aware of the vast gap in experience between them, Eren strives to learn as much as he can from Levi, heeding his advice with little hesitation and trusting his judgment. During the thirty days he shared living space with Levi's squad, he also seems to have learned the standard of cleanliness Levi demands very well.
 * Annie Leonhart - Eren greatly admired Annie, and was trained in her unique fighting style during their years as cadets. He considered her to be a kind person beneath her cold exterior and credited her with making him aware of the contradictions within the military system. However, he was eventually horrified to learn of her identity as the Female Titan. Even as Annie herself transformed in front of him, a part of Eren refused to accept her betrayal; and he became so conflicted that he was initially unable to summon the will to fight her (Mikasa even went so far as to suggest that his hesitation was due to him harboring "special feelings" for her). Even as he went toe-to-toe with Annie, he continued to brood over what had driven her to slaughter their comrades.
 * Reiner Braun - Eren once described Reiner as being like an older brother to him, and admired him as a "strong, capable guy". The two were shown to have trained together, and Reiner taught him the importance of the duty soldiers have to protect the weak. It can be said that he was the one Eren looked up to the most in his career as a soldier. However, once he and Bertholdt Hoover revealed their identities as the Armored and Colossal Titans, the friendship they had was destroyed.
 * Conny Springer - As members of the same trainee squad, Eren and Conny shared many experiences together and get on well with each other. In the early days of their training, Conny was among the cadets who eagerly questioned Eren about the Titans' invasion in 845. Though he only enlisted in order to have a good reputation in his home village and initially wished to join the Military Police Brigade, Conny was so moved by Eren's passionate conviction to defeat the Titans that in the end, he decided to join the Scout Regiment instead.
 * Hange Zoë - When Eren first met Hange, he was put off by her obsession with him, finding it creepy. After learning about her work on Sawney and Beane, however, and her reason for being so obsessed with Titans and change (which he could relate to), he became one of the first people to be interested in Hange's work and was saddened by the deaths of the Titan test subjects (although he still finds her weird, especially after she kept him up the entirety of one night).
 * Grisha Jaeger - Much like his late wife, Grisha was shown to be a very caring parent towards Eren, greatly concerned with his personal development and general well-being. He understood his son's nature very well, and though he would reprimand Eren when he stepped out of line, he was more likely to simply listen to and guide him. Eren seemed to appreciate Grisha for this, and as a result was greatly frustrated and saddened by his sudden disappearance after Wall Maria fell. Upon remembering the mission his father left him before he vanished, Eren expressed anger and bitterness at the fact that Grisha had kept secrets from them, on top of abandoning himself and Mikasa. He also seems to hold to the belief that his father is still alive, at times pondering over his whereabouts and what he had been doing since the fall of Wall Maria.
 * Carla Jaeger - Carla cared for her son deeply and seemed to want the best for him. Not surprisingly, she was against the idea of Eren enlisting in the Scout Regiment when he got older, as many people died outside the Walls. Though Eren never listened to her warnings or advice and insisted on pursuing his dream, he loved her very much. During the fall of Shiganshina, he struggled in vain to rescue her from the rubble of their demolished home despite being surrounded by Titans and wanting to run away from the danger. Unfortunately, he was ultimately forced to watch a Titan devour her as he was hauled to safety. Her brutal demise and his own powerlessness to prevent it severely traumatized Eren. In his grief, he expressed remorse for continuing to disobey and argue with her in their last moments together, and her loss fueled his virulent hatred of all Titans.
 * Hannes - Prior to the fall of Wall Maria, Eren was constantly frustrated by Hannes being a habitual drunkard in the line of duty. Despite not having saved Carla from the hands of the Titan, Eren bore no ill will towards him, and instead, he looked up to him with respect and understanding. After Hannes was eaten by the Smiling Titan, Eren became enraged, showing that he had a deep friendship with him.
 * Marco Bodt - Eren had great respect for him, and recognized his tendency to think of the group before himself. He also stated he would have liked to be on his squad, and considered him a good leader. Upon learning of Marco's death, Eren was initially in a state of disbelief and was visibly stricken when Jean reaffirmed that the news was true.
 * Petra Rall - Among the members of the squad assigned to protect Eren, Petra seemed to be the one closest to him. She was among the least eccentric and most friendly of the members, and Eren admired her not only for her skill but for her open acceptance of him as a comrade as well. Witnessing her demise at the hands of the Female Titan was a devastating blow to him, and he remains remorseful of making the decision that led to her death.
 * Oruo Bozad - Of all the members of Levi's squad, Oruo gave Eren the toughest time, often badmouthing and blustering at him. Despite his senior's somewhat obnoxious and boastful demeanor, Eren still respected Oruo as a top-tier soldier. His violent death was perhaps the trigger event that caused Eren to finally transform to his Titan form to stop the Female Titan in its tracks. Along with the other member's of Levi's special squad, his death still haunts Eren.
 * Eld Gin and Gunther Schultz - Eren admired the two soldiers; both in their skills, serious attitude and devotion to humanity by facing the Titans. Their deaths partly fueled Eren's rampage against the Female Titan, and he is still filled with regret over not choosing to fight while they were still alive.

People Killed

 * Two unnamed kidnappers

Failed attempts

 * Mikasa Ackermann (unintentional)

Trivia

 * Eren ranked second in the First Character Popularity Poll, right after Levi.
 * Eren was known for fighting with local bullies before Shiganshina fell.
 * In a flashback, his father notes that he does not make friends easily.
 * Hajime Isayama has said that he does not see Eren and Armin being best friends forever.
 * The name Eren is of Cultural Ethnic Turkish origin. Its exact meaning and description is "He who progresses/has reached towards divine maturity and sacred wisdom". It can also be interpreted as a "saint" or "holy person". "Eren" could also stand for the German word "Ehre" (plural "Ehren"), which means honor.
 * Eren's surname, Jaeger, is common amongst German-American migrants.
 * Eren Jaeger sounds similar to the German word "Ehrenjäger", which means "titular hunter".
 * According to Armin Arlelt, the 104th Cadet Corps nicknamed him the "Suicidal Bastard" (死に急ぎ野郎).
 * When speaking about Titans, Eren has a habit of using -hiki (the counter suffix for small animals) instead of -tai (the counter for large animals), signifying his deep contempt for them.
 * He has the highest Titan kill record by far of all the former graduates of the 104th Cadet Corps, though he has killed only one Titan in human form with his ODM abilities, and the rest have been killed using his Titan abilities. In human form, the most kills belong to Mikasa.
 * According to Isayama, if the 104th Cadet Corps had an arm wrestling competition, Eren would be evenly matched with Jean Kirschtein.
 * Hajime Isayama stated in an interview that he based Eren's Titan form off of the Japanese martial artist Yūshin Okami, paraphrasing it to be the "ideal physique of a middleweight mixed martial artist".
 * Whilst lifting the giant boulder in his Titan form to block the breach in Wall Rose, Eren bore a striking resemblance to the Ancient Greek Titan, who supported the on his shoulders.
 * An interview with Isayama's editor in Otomedia's October 2013 issue revealed Isayama originally intended for Eren to have known all along that he was a Titan, but scratched the idea.
 * Feuerroter Pfeil und Bogen is Eren's theme song in the anime. The song alludes to his name multiple times.
 * It had been stated by Carla in the anime that Eren's ears blush when he is lying.
 * In the anime adaptation, there are few instances of foreshadowing Eren's Titan ability before it is fully revealed.
 * Soon after Wall Maria falls, Eren dreams of his father injecting him with a mysterious serum.
 * When Eren fails basic balance training due to faulty equipment, he cracks his head against the ground. The steam that rises from his head is actually his unconscious ability to regenerate rather than embarrassment (and unlike the manga, his injuries fully heal by the very next day).
 * In the anime, Eren's Titan form has (a third eyelid possessed by predatory species such as sharks, birds of prey, and reptiles); it can be observed blinking them several times in episode 8. it is unknown whether it possesses this trait in the manga.
 * In the game Age of Gunslingers Online, a special Titan Mode was made as a tribute to the series. It features Eln, an NPC modeled after Eren and voiced by Yūki Kaji. A trailer of this mode can be viewed here. There is also a special skin for the Dual Pistol class available for purchase.
 * Eren is one of the Attack on Titan characters that were made into Nendoroid figures, along with Mikasa, Levi, Armin, and the Colossal Titan.
 * Eren ranked first in the Akiba Souken Shingeki no Kyojin online character popularity poll.

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