Ymir

"Krista...I have no right to tell you how to live. So this is just...a wish of mine. Live your life...with pride."

- Ymir to Historia before revealing her Titan powers

Ymir (ユミル) was a graduate of the 104th Training Corps and former member of the Survey Corps. She had the ability to transform into the Jaw Titan, and had knowledge concerning the true nature of Titans and the history of the world outside the Walls.

Human form
Ymir was a tall, slender young woman with parted, disheveled-looking black hair often styled into a ponytail. Her hair was held back with a white tie. She possessed intimidating gray eyes.

Titan form
Ymir's Titan form, the Jaw Titan, was considerably smaller than most Titans, standing at. It had long arms, a large nose, rugged hair, small black eyes, small pointed ears, sharp fangs and claws allowing her to easily climb trees and tear into enemy flesh. Unlike other human-controlled Titans, the body was not well-proportioned because her head was too big. Unlike the Female Titan, her Titan form possessed no distinctly feminine features, similar to Pieck's Cart Titan. Overall, it lacked the distinct similarity to her human form that the majority of the other human-controlled Titans show. Prior to eating Marcel Galliard, her Titan form was noticeably thinner, her rib cage was more prominent and she had regular teeth instead of sharpened teeth.

Personality
Initially, Ymir appeared to be selfish, cynical, uncooperative, exploitative, and confrontational, but later revealed kindness, especially around Historia Reiss. Even earlier, she showed this aspect of herself when she took full responsibility for the Eldian cult's existence, despite her followers betraying her first.

After regaining her human form, she resolved to proudly live for herself only, thinking it as the best revenge against all those who hated her for her mere existence, and those who had used Ymir for their own purposes. For this reason, though aware of Marley's existence and the secret behind the Titans, she refused to divulge any information to anyone behind the Walls. While not completely willing to trust Reiner and Bertolt, she betrayed the Eldians of Paradis Island in exchange for Krista's safety. Due to their similar background and painful experiences, Historia was one of the few people she truly cared about, wishing to protect her at any cost.

Ymir was extremely perceptive and could discern the nature of the people around her with alarming accuracy, such as Historia's martyrdom mentality, Reiner's split personality disorder, and Sasha's desire to look good in front of her peers by hiding her native accent and developing an extremely polite and formal way of speaking. Due to her experiences and belief in self-pride, she tended to rudely criticize people for being untrue to themselves.

Oddly, her personality appeared to be a foil of Krista. Due to her dark past, Krista often pretends to be a sweet girl so that others will remember her fondly. However, her true nature is darker, more depressing, and lonely. Ymir's true persona appeared to be much more selfless and quite emotional, which is shown when she accepted Reiner and Bertolt's offer to return to their hometown in exchange for Krista's safety. She saved Erwin Smith's life, even though she blamed him for her plan to ensure Krista's future failing. It should also be noted that she showed considerable regret over devouring Marcel, Reiner and Bertolt's friend, regardless of the fact she did not do it consciously, and showed gratitude to them later on, since their arrival is what caused her to regain her human form.

While Ymir was not arrogant, her pride was what defined her character the most. She repeatedly claimed to only do things for herself, often rejecting the notion that she was putting herself out there or at risk for others' sake. Her pride prevented her from revealing her Titan ability and any extremely valuable information to the Survey Corps. It also might have played a part in her decision to save Reiner and Bertolt out of a sense of being indebted to them, even though she knew it meant her own death and never seeing Historia again.

History
Many decades ago, a nameless, homeless, Eldian girl lived in the streets of Marley as a beggar. Eventually, she was found by a man who gave her the name "Ymir," after the ancient Ymir Fritz, and brought her into a cult dedicated to the worship of Ymir. She was worshiped by many Eldians in the cult, and Ymir chose to abide by her new role in order to bring happiness to those around her. However, a time came when the cult was discovered by the Public Security Authorities, and the man who named her claimed she had deceived him. Ymir chose to abide by her given name, and she was arrested with the other cultists. After being paraded around Marley and stoned by angry citizens, the cultists were taken to the borderline of Paradis Island and forcibly turned into Pure Titans.

Ymir spent about sixty years wandering outside Wall Maria as a Pure Titan. During this time, she retained little awareness or memory, but described it as having been an "endless nightmare." It was in 845 that she encountered Reiner, Bertolt, Annie, and Marcel as they were making their way towards Wall Maria in order to infiltrate it. She then stole the power of the Titans from them, attacking Reiner and in the end devouring Marcel after the boy pushed his friend to safety.

Soon after this event, she regained her consciousness and human form. She spent the next two years living within Wall Sheena, sneaking about and spying on their society, surviving as a skilled thief. It was during this time that she overheard a conversation between members of the Church of the Walls, and learned about "Krista Lenz," an illegitimate child who had been given a new name. Her interest in Krista led her to enlist in the military.

Ilse Langnar, a member of the Survey Corps that resembled Ymir, encountered a Titan that spoke of her as a "Subject of Ymir." This Titan mistook Ilse for Ymir, and bowed before her while referring to her as "Lady Ymir." Ilse's notes of the encounter were later discovered by Hange Zoë. These were the first hints of Ymir's true nature.

104th Training Corps arc
On the first day of training, Ymir and Krista venture outside and fetch refreshments for Sasha after her 5 hour-long run as a punishment. Ymir acts apathetic and shows little care for Sasha's well-being, telling Krista that she could use Sasha's stupidity to her advantage.

At a later time during their training, Ymir confronts Sasha about speaking in an overly polite tone, rather than her home's dialect. Ymir begins to criticize her for it, and Krista scolds her and claims that Sasha should speak however she wants to.

At some point during training, the trainees of the 104th Training Corps complete a snowstorm training exercise, arriving at a base at the foot of a mountain. After their fellow trainee Daz loses consciousness during the exercise, Krista elects to try to pull his body along on a cot, despite Ymir's protests. Ymir argues that they will only survive if they abandon Daz and head for base together, but Krista insists that they could all survive if Ymir goes ahead of her. Noticing that Krista has not asked for help during their entire course, Ymir deduces Krista has no intention of saving Daz nor herself, and that she is using their situation as an excuse to die in a heroic way.

Ymir reveals that she is aware of Krista's true past, having heard officials from the Church of the Walls discussing her existence. Krista asks if Ymir joined the Training Corps in order to find her, and Ymir proposes that it may be due to her own past being similar. Krista asks if Ymir originally wanted to befriend her, but Ymir says that they are nothing alike, as Ymir kept her old name after starting a new life, because abandoning her name would be to admit defeat. By living for herself, she robbed her enemies of their power. Ymir scolds Krista for looking for death rather than directing her feelings towards her enemies, and Krista says that there is no longer any way for all three of them to survive their mission.

Ymir leads Krista to a cliff overlooking the base at the foot of the mountain and proposes tossing Daz over the edge so that she and Krista can make it to the base alive while Daz could be searched for later. When Krista objects, Ymir takes matters into her own hands and throws her aside into a snowbank. She then transforms, and uses her Jaw Titan form to carry Daz down the mountain to base camp.

When Krista arrives, Ymir shows her that Daz was safe indoors. Ymir decides to reveal to Krista how she saved Daz, but only if she promises to live by her true name when her secret eventually becomes known to everyone.

Ymir does not graduate with a ranking in the top 10 in the 104th class. Upon learning this, Krista deems that she deserved to be there more than herself. It is implied that Ymir intentionally performed badly so that Krista could have the 10th rank.

Battle of Trost District arc
Ymir was in the Trost District when the Colossus Titan breaks down the gate. She is part of the squad that discovers a catatonic Armin, and mocks him upon learning that he is the only survivor. This results in a brief and heated exchange with Connie Springer, before Krista steps in to mediate. In response, Ymir requests that Krista marry her once the battle is over. She is later among the squads able to retreat over the Wall when the order was given, and waited on standby for further orders.

The Female Titan arc
After graduation, Ymir follows Krista into the Survey Corps. During the expedition outside the Walls, she asks Bertolt if he knows where Krista is.

Clash of the Titans arc
Ymir is one of the Survey Corps members taken outside Wall Sheena by Mike Zacharias and disarmed of her equipment on suspicion of being a potential accomplice to Annie Leonhart. When Titans mysteriously appear within Wall Rose and the rookies are sent to warn the nearby villages, Ymir recommends to Krista that they run away, but Krista refuses.

After the rookies take refuge inside Utgard Castle, Ymir asks Connie about his village. She begins to comfort him upon learning it was destroyed, but mocks on him when he speaks about the resemblance between his mother and the Titan he found lying on his old house. Later, Ymir comes under the suspicion of Reiner when he notices that she can read the label of a herring can, despite it being written in a writing unknown to the other members of the squad. Reiner suspects that there is more to Ymir's past than she lets on.

When the castle comes under attack by Titans capable of moving at night, Krista, Connie, and Ymir find an old cannon they use to incapacitate a Titan that had come in the tower. With Bertolt's help, she manages to push off the tower another one. As Krista treats Reiner's wound, she asks her to take care of her as well but is interrupted by Connie who notes that she has just a scratch. Later on, a huge rock lands on the top of the tower, killing Lynne and Henning. Along with her friends, Ymir goes there and tries to find where the strike came from.

As the battle progresses, Gelgar and Nanaba are also killed, leaving the recruits defenseless. Fearing the end is near, she tells Krista to live a life she will be proud of. Asking her to remember a promise that they made earlier, Ymir jumps from the tower and cuts herself with the knife Connie gave her, triggering her transformation into a Titan. Ymir fights the Titans strategically, aiming for the nape of their necks and showing great focus. However, while being fast and vicious, her Titan form is no larger or stronger than most Titans, and she is soon caught. The Titans attack viciously and Ymir reaches for the wall, but consciously releases it as the heavily damaged tower shows signs of falling over. Krista reasons that with her power, Ymir could have easily escaped alone, and that she is putting her life on the line to fight for the recruits' survival. Ymir then breaks the tower, burying the Titans under the rubble. She rescues her friends, managing to communicate with them in her Titan form by growling a few coherent words.

When the Titans begin to emerge from the rubble, Ymir launches herself at them immediately. However, she cannot defeat them and they slowly begin to tear her body apart and devour her. Her human body is shown to emerge from her Titan flesh while in a state of unconsciousness. The arrival of Hange Zoë's squad saves her, and she is quickly given medical treatment. Before passing out, Krista reveals to her that her true name is Historia.

Later on, however, Ymir, along with Eren, was kidnapped by Reiner and Bertolt. Bertolt, in his Colossus Titan form, captured her and a soldier with vertical maneuvering gear. He proceeds to swallow them both whole. After falling on Eren, Bertolt appeared out of the smoke carrying Ymir and wearing the equipment. He climbs onto the Armored Titan's back, still carrying her. She regains consciousness before Eren, though both are left recovering from serious injuries and therefore unable to transform. When Eren attempts to fight, she counsels him against this and points out that they are surrounded by Titans and at a huge disadvantage since their captors are armed and uninjured. She asks Reiner to start talking, as he had promised to do so once Eren awoke.

Realizing they have no choice but to wait until nightfall, the group settles in for a long wait. When Ymir asks for water, complaining about how long it is been since they had something to drink, Reiner begins to act strangely. Eren becomes angry about this, but Ymir accurately determines that Reiner's mental state has deteriorated as a result of his inability to cope with his guilt of being the Armored Titan.

Recovering from his episode, Reiner tells Ymir that if she joins his side, then she will be pardoned. She initially rejects this offer, stating that they do not trust her and she does not trust them. But Reiner claims they can trust her, since her only goal is to protect Krista; he also wants to do the same. After a while, Ymir agrees to ally with Reiner and Bertolt, and refuses to answer Eren's questions.

Reiner and Bertolt notice a signal flare, and begin preparing to flee the advancing rescue party. While Reiner subdues Eren, Bertolt confronts Ymir over her past and the fact she killed one of their comrades. She confesses to not having any memory of that time, but apologizes for it. Furthermore, she reveals that she spent 60 years wandering outside the Walls as a Pure Titan and only regained her mind and human form five years ago. She describes her time trapped in her Titan form as an "endless nightmare."

As they begin to flee through the forest, Ymir notices the signal flares and realizes Krista has come to rescue her. She demands that they kidnap Krista now, and when they refuse, she begins to attack Bertolt, threatening to fight them to the death if necessary. Even though doing so may endanger Krista's life, Ymir states she is a horrible person that wants to see her one more time.

The rescue team notices a light in the forest, and shortly afterward encounter Ymir in her Titan form. She ignores all attempts to question her about what happened, looking around until she spots Krista. To everyone's shock, Ymir leaps forward and captures Krista whole in her mouth, immediately fleeing into the trees to rejoin Reiner and Bertolt. After Reiner transforms, she climbs onto his back and the group begins to flee into the wilderness with the soldiers in hot pursuit.

Still hanging onto Reiner's shoulder, she spits Krista out and partially emerges from her Titan form, apologizing for what she has done. Krista initially assumes Ymir is being forced to cooperate with the traitors, and tries to convince her to release her. Ymir hesitates visibly, at which point Bertolt yells at her and asks if she intends to abandon Krista.

Breaking down, Ymir confesses to Krista that she once "stole" the Titan's power from Reiner and Bertolt's people and has been on the run from them since then. And in order to save herself, she intends to hand Krista over to them in order to be pardoned for her crimes. Calling her "Historia," she begs the other girl to save her. To her shock, Krista smiles and promises to always be on her side.

When several soldiers catch up and begin to launch hooks into the Armored Titan, Ymir pulls them out and drops the soldiers to the ground. She is ambushed and partially blinded by Mikasa, who violently threatens to kill anyone that gets in her way. The two briefly fight, before Krista intervenes and tries to plead with Mikasa to stop. However, Mikasa threatens to kill them both if they get in her way, forcing Krista and Ymir to back off. They observe the confrontation between the former friends, and Ymir looks thoughtful as she listens to Bertolt's confession.

However, Erwin Smith arrives with a swarm of Titans and forces the others to retreat for a time. The Armored Titan charges into the oncoming horde, with Ymir barely able to hang on. They are quickly surrounded and overwhelmed, and Krista is quickly attacked by one of the many Titans. This drives Ymir into action, beginning to fight against the other Titans to defend her. The soldiers look on in horror, but quickly take advantage of the chaos to mount a second attack.

In the ensuing battle, Ymir and Krista become separated from the others. A larger Titan manages to overpower her, but she is rescued by Krista. Connie arrives on the scene, snatching Krista up onto his horse and retreating from the battle. Ymir follows beside them, seemingly abandoning any further attempts to aid Reiner and Bertolt in favor of immediate survival. Much to their surprise, Connie expresses his faith in Ymir and points out that she only takes things seriously when it comes to protecting Krista.

During the chaos of the battle, Ymir manages to get the drop on Erwin Smith and charges in to attack him. She expresses anger at him for ruining everything, but at the last moment, she instead rescues him from another Titan. As she finishes it off, Connie and Krista catch up with her. Krista uses her equipment to jump onto Ymir's head, confronting her over having lied to protect her once again. She declares that they should live only for themselves, and proclaims that she will never fear anything as long as Ymir is at her side. This declaration renews Ymir's spirits, and the pair charge into battle together to face the Titan horde.

When Eren's power as the coordinate manifests, Ymir senses it and reacts with surprise. She becomes convinced that this power to control other Titans is the reason Reiner and the others were willing to risk their lives to obtain Eren. This makes her begin to reconsider her options, wondering if perhaps she should ally with the Survey Corps instead. She realizes this power could mean a future within the Walls, and also realizes she will not be able to protect Krista on her own.

In the aftermath of the battle, she begins to flee with the surviving soldiers. However, she turns back and hesitates upon hearing Bertolt screaming as he and Reiner desperately attempt to fend off the Titans attacking them. She turns back to Krista, offering a broken apology and reaches out to gently stroke her hair. Without another word, she rushes back into battle and rescues Bertolt from the Titan about to devour him, with the others being left to puzzle over her actions.

However, she survived the battle, and fled with the traitors to the ruins of the Shiganshina District. There, she berates herself for her foolish actions. When questioned about her actions, she states that she knows that Reiner and Bertolt cannot return to their hometown empty-handed, and offers herself as a prisoner. Reiner attempts to let her go, but she refuses this kindness and states that she is tired. Bertolt asks why she saved his life, and she responds by expressing her gratitude to them since their actions led to her regaining human form. She claims to be the only one capable of understanding their circumstances, further expressing sympathy as they are "the same" and unable to do anything on their own. Thinking of Historia, she smiles and states that playing "Goddess" is not so bad, referencing the girl's selfless reputation.

The Uprising arc
The conversation she had with Bertolt in the Forest was later recalled by Eren, and written down for Hange Zoë. This information proves to be vital, leading Hange to speculate that Titans are able to absorb the abilities of devoured humans with the power of the Titans. By devouring Marcel, Ymir gained his powers and regained her humanity. This leads Hange to further speculate that this may be one reason Titans instinctively seek to devour humans and transformed intelligent Titans.

Historia's memory about Ymir telling her to live her life with pride later inspires her to defy her father and refuse to eat Eren.

Return to Shiganshina arc
Before Reiner and Bertolt get into position to prepare for the Survey Corps, Reiner remembers that they made a promise to Ymir to save Historia. Later that day when Reiner is defeated, he reveals that Ymir had written a letter to Historia, which Hange keeps for later inspection. Handed over to Historia later, in it Ymir reveals that Reiner was waiting beside her as she wrote, and that she was going to die soon. She went into her past as a nameless child, being turned into a Titan at Paradis Island sea wall, and regaining her humanity after devouring Marcel Galliard. She began living her life without regrets, except the one of not being able to marry Historia, and expressing her love for her.

Marley arc
Presumably, before the battle of Shiganshina District, Ymir willingly decides to return her Titan powers back to Marley as thanks for Reiner delivering her letter to Historia. In Marley, she is restrained and eaten by Porco Galliard, Marcel's brother, who inherits the power of her Titan along with all her memories.

He mentions that when receiving Ymir's memories, Reiner Braun appeared to be a very different person on Paradis Island than on Marley, accusing him of imitating Marcel's Warrior-like personality.

Abilities
Ymir possessed great physical ability - she showed to be fully capable in combat and the use of weapons. During her time as a trainee, it had been rumored that she started slacking off to ensure Historia Reiss a spot in the top ten so she could join the Military Police Brigade.

Power of the Titans
Ymir was able to transform herself into the Jaw Titan (顎の巨人), a 5-meter Titan.
 * Speed: Despite her small size, her Titan form had above average speed and agility, which made it easy for her to climb walls and trees in order to dispatch multiple enemies in quick succession by biting them in their nape while using her claws and pointed teeth, a tactic used several times by her. Against humans or other Titans in a forest, she would have the advantage, as she could swiftly outmaneuver them. But her size has proven to be a problem, since she was easily overpowered by Titans not long after her transformation at Utgard Castle.
 * Regeneration: She had shown the ability to automatically heal any injury and even regrow entire limbs. When she lost her right arm and leg at the battle of Utgard Castle, she was able to regenerate them in a matter of hours.
 * Partial Transformation: She also possessed the ability to partially emerge from the nape of her Titan form, allowing her to interact with others while still transformed, similar to Uri Reiss. This appears to be a defining ability of the Jaw Titan, as Porco Galliard does the same during the Battle of Liberio.
 * Communication: While others with the power of the Titans, such as Eren Yeager, are unable to form words while transformed, she is skilled enough to communicate through her Titan form, though she is unable to speak as eloquently as Zeke Yeager's Beast Titan.

Relationships

 * Historia Reiss - She was romantically attracted to Historia, and utterly devoted to her. Ymir's primary goal was to protect her no matter the cost; this is possibly why she started to slack off in order to allow Historia to graduate in the Top 10, which would give her a chance to live safely in the Interior as part of the Military Police. The two had a strong connection, and deeply trusted each other even while keeping secrets. Ymir actively worked to discourage Historia's martyr complex, and challenged her to embrace her true identity and live for herself with her head held high. Her influence in Historia was so strong that she even rejected to inherit the Founding Titan and fought her father.
 * Reiner Braun and Bertolt Hoover - Ymir agreed to become their ally, and work with them in exchange for Krista's safety. She expressed that she did not trust them entirely, and believed that even if she cooperated with them, she will eventually be killed by their "Warriors." When they attempted to flee without kidnapping Krista, she made it clear she will fight them to the death if they did not give into her demands. When things looked bad, she quickly abandoned them and considered leaving them to their fate. However, for an unknown reason, she decided to leave Krista behind in order to come to their aid. It is later revealed that she felt a sense of gratitude towards them for accidentally triggering her return to human form, and she stated that she was the only one capable of understanding their circumstances, as they are "the same." She further stated that she wished to "return what she took from them" and insisted on returning to their hometown as their prisoner.
 * Connie Springer - Connie is an antithesis to Ymir; Ymir was as wily as Connie is obtuse. Ymir was as selfish as Connie is empathetic. Connie has many friends as Ymir only had Krista as her friend. Inevitably they had an antagonistic acquaintance, often exchanged verbal barbs with each other. They had repeatedly clashed (one incident almost physically), as Ymir often made him the target of mockery and he called her pejorative names due to her haughty attitude. Even so, it would not be right to say that they were on completely bad terms; as Connie was quick to defend her when she appeared before the soldiers in Titan form. Later, when he encountered her again during battle, he told Krista that Ymir only acted seriously when it came to protecting her, showing that even after her apparent betrayal, he still believed in her.
 * Sasha Blouse - Ymir was not ashamed to take advantage of other people, especially if they are naive and simple-minded. She initially helped Sasha back to bed after she collapsed in exhaustion, and used this to make Sasha feel indebted to her. It is shown that she often pushed her chores onto Sasha, but she also was the one to confront Sasha over hiding her real dialect/accent and demanded that she not be ashamed of her roots.
 * Eren Yeager - Ymir and Eren had few interactions prior to being kidnapped by Reiner and Bertolt, with him admitting he did not know her well at all. They quickly come to mistrust each other, due to Ymir's secretive nature. Ymir was critical of his short-sighted viewpoint and stated that she could not rely on him for anything, and instead chose to side with the Warriors. However, she was surprised when she discovered Eren possessed the Coordinate and took back her previous views of him. With this, she saw that Historia was going to be safe as long as he was around, deciding she was going to leave her in the Walls as she went off with Reiner and Bertolt.

People killed

 * Marcel Galliard (unintentional as a Pure Titan)

Trivia

 * is a primeval being in Norse mythology who is the progenitor of all jötnar (giants). "Ymir" also means "the scream."
 * The official website mentions Ymir was in love with Historia (Krista).
 * In the original draft for the series, Ymir slacking off to give Krista the 10th rank is discussed immediately after graduation. In the published version, Krista does not confront her about this until much later.
 * Ymir shares a birthday with Lynne.
 * Though she first appeared in chapter 5 of the manga, she was not named until chapter 36.
 * In Chapters 39 and 40, Ymir's Pure Titan was originally shown to have sharp teeth, but Chapter 95 would later retcon this and establish that her Pure Titan had normal human-like teeth, revealing that her sharpened teeth were products of the Jaw Titan.
 * Ymir spent 60 years as a Pure Titan, and did not begin aging again until she regained her human form. This suggests that while Ymir was physically and mentally 17, her chronological age was most likely between 70 and 80 years of age.

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