Bertolt Hoover

Bertholdt Fubar (ベルトルト・フーバー) is a graduate of the 104th Trainees Squad and former member of the Scouting Legion. He ranked 3rd, and is described by others as a weak-willed and quiet person rarely seen without Reiner Braun, his childhood friend.

Along with Reiner and Annie, he is a person that possesses the ability to transform into a Titan and serves an as-yet unrevealed group. He comes from a mysterious homeland outside the Walls, and was on a mission to infiltrate the military in search of something that Reiner refers to as the "Coordinate". After his true identity was revealed, he becomes a major antagonist in the story.

Personality
Bertholdt is a quiet, young man, identifying himself as someone with a weak will that follows popular opinion. Likewise, their instructor noted him to be a person with great potential, but an utter lack of initiative. He is further described by Eren as being taciturn, and tends to remain in the background unless necessary. By his own admission, he is something of a coward and his official ratings note him to possess a "self-esteem" of a 1 or 2, out of 10.

However, it is also revealed that he can be incredibly cold towards others. When confronted by Eren over his crimes, he merely states that it was "unfortunate" and shows little remorse. On the other hand, he shows great concern and distress when it comes to Reiner.

Human Form
Bertholdt is a rather tall, slender young man. He has short, dark hair and green eyes. In the anime adaptation, he has a slightly darker tan.

Titan Form
As the Colossal Titan, he possesses a very distinctive appearance and a number of unusual features. First of all, it is roughly 60 meters tall, making it around four times the height of any other Titan seen thus far in the series.

Bertholdt's Colossal Titan form is one of the more heavily deformed Titans seen in the series - it appears to lack skin entirely and its jaw and facial structure seem to be heavily altered from the human form. It is also constantly releasing jets of steam from the surface of its body, in a manner that parallels Bertholdt's frequent nervous sweating. Its feet are also quite different to those of a human and other Titans, as they are swollen and pillar-like in appearance. Its physiology is modeled after the male gender, but like all Titans, it lacks obvious sexual organs.

History
Bertholdt comes from a mysterious location simply referred to as his hometown (or homeland), and began a mission to attack humanity in the year 845. Little is known about his life prior to undertaking his mission, other than the fact that Reiner and Berik were his childhood friends. The exact nature of their group, and their mission is yet unknown. It is mentioned that their goal was to exterminate humanity, and that they are searching for both the Ape Titan and a "coordinate" which they believe may be Eren Yeager or possible to locate with the assistance of Historia Reiss.

Introduction Arc
Bertholdt first appeared as the Colossal Titan in the year 845, shortly after the history of the world and humanity's situation have been introduced, along with Mikasa, Eren and Armin. Its mere presence is enough to cause considerable panic amongst the population, as it is tall enough to see completely over the wall that is supposed to keep all Titans out. Within moments of its appearance, it attacks, repeatedly kicking the wall gates to the point that they rupture and open a hole large enough for other Titans to pass through. It then disappears after causing considerable structural damage to the wall, but does not attempt to participate in any meaningful way in the ensuing massacre itself.

Eventually, Bertholdt joined the military, with aspirations of joining the Military Police and living in the safety of the inner wall. As part of the 104th, he was considered to be one of the best in regards to 3D Maneuver Gear, enough so that Eren Yeager came to him for advice when he was dealing with faulty equipment. After seeing Eren's determination and desire to join the Scouting Legion, he considered himself a coward for wanting to get far away from them. However, Eren encouraged him, saying that after witnessing the attack on his village, no one would blame him for his decision. Eventually, he graduated in the top ten of his class coming in at third place, just under his friend Reiner.

Transformation Arc
He reappears as a Titan five years later in 850, again breaking through the walls so that its brethren can once again devour the humans inside. It is immediately attacked by Eren Jaeger, however, it first repels and blinds him with vapor from its high temperature body before vanishing completely from view.

When Armin, Mikasa and Connie made it to the headquarters, with the help of the rogue titan, Armin devised a plan to get rid of the titans in the supply room. Bertholdt, part of the second group, came in from the ceiling and killed his target in one blow. The mission a success and everyone resupplied, he and the rest of the group leave the head quarters. On the way out, he joins Mikasa and others on the rooftop as they watch the rogue titan being attacked and eaten by other titans. Reiner suggests helping it out, but ultimately it ends up not being necessary as the titan fights his way out and kills the titan that ate Tomas. After the titan collapses, he is among the first people to know about Eren's ability. Bertholdt joins the Scouting Legion with Mikasa, Reiner, Eren, Connie, Sasha, Krista, Jean and a few others.

Breach Arc
Bertholdt, like Reiner was shocked when he learns that Ymir is the 15m titan that attacked Wall Maria with the others.

It was revealed that Bertholdt is the Colossal Titan, and the Scouting Legion attack him. Knowing he's about to die, Bertoldt unleashes a gas which exerts intense heat in order to defend himself. After hearing Reiner's call for help, Bertholdt's Titan body jumps from the wall in an attempt to trap Eren underneath his massive frame.

The resulting explosion wounds most of the Scouts, and allows them to successfully capture Eren and flee the scene. He emerges from his Titan form carrying Ymir and wearing the stolen gear of a soldier he devoured, suggesting further unknown abilities possessed by his group. Several hours later, he takes refuge with Reiner and their two captives in the Forest of Giant Trees. However, he is mostly silent during the following arguments and discussions, only speaking up when prompted by Ymir or Eren.

Bertholdt responds to Reiner's strange behavior with great distress, and is shown to have known about it long before anyone else. He is able to bring his friend back to reality by informing him that he is not a soldier, but rather that they are both "warriors". Ymir guesses this to have been the cause of previous tensions between them that she had observed.

Eren later confronts him about his role in the death of Carla Yeager, demanding to know what he thought when he learned about the suffering he'd caused. He responds with a vague comment about having felt sorry for him, horrifying Eren and leading him to scream at them both. While Reiner and Eren argue further, he remains silent and observes the efforts to sway Ymir over to their side.

Though she agrees to work with them, Bertholdt remains unconvinced and warns Reiner that she cannot be trusted. He brings up the death of their friend, who was devoured by Ymir, though Reiner reassures them that she can be trusted since her only consideration is Christa's safety. Bertholdt worries he may be slipping into his delusions again, but is reminded that Krista has value to them since she's a member of the Reiss family and may be able to provide them with important clues. They discuss their mission to find the "coordinate", which may or may not be Eren, and Bertholdt expresses his eagerness to go home and never return to the human lands. Reiner responds by teasing him, demanding that he confess his feelings to Annie once they make it home. Bertholdt attempts to protest, but Reiner claims his tendency to stare at her gave him away.

The pair notice a signal flare and realize the rescue team has already found them, and prepare to flee. While Reiner subdues Eren, Bertholdt confronts Ymir over the death of his friend. She states she has no memory of having done it, but apologizes to him and asks if he hates her. He admits he isn't certain, but he can't hold her responsible since none of them wanted to devour humans. He asks how long she wandered as a mindless Titan, and implies that he and Reiner may have also spent some time trapped in their Titan forms in the past.

As the group flees, Ymir notices the signal flares and becomes agitated. She demands that they kidnap Christa, and attacks Bertholdt when they refuse. They are forced to land in the trees, and she further physically intimdates and threatens Bertholdt until they relent. Once Ymir returns from kidnapping Krista, he straps an unconscious Eren to his back and both cling to the Armored Titan's back as he runs from the pursuing troops.

Abilities
Bertholdt graduated at 3rd position among the trainees, and was noted as the best user of the 3D Maneuver Gear among them. Due to his high level position, he is also likely to possess other military and combat skills.

Titan Shifting
Bertholdt possesses the ability to transform into a unique, 60m Titan, referred as the Colossal Titan. Due to his massive size, he is the biggest Titan shown so far in the series. Also, due to this immense frame, his physical strength is tremendous being one of the only two Titans, the other one being the Armored Titan, who can damage and tear down the walls, such as Wall Maria. However with his immense size he is also incredibly slow, making it easy for anyone with 3DMG to move around him.

Bertholdt's Titan form also possess a powerful defense mechanism against close-range fighters, which involves him releasing large amounts of extremely hot and pressurized steam from his body, effectively repelling and/or burning whoever comes in close range to him.

His form is also noteworthy for being able to form and dissolve almost instantly, as opposed to most Titans. During the attack on Wall Rose, he was able to dissolve his Titan form literally within seconds, vanishing before Eren could react. This may be related to his ability to generate incredible heat, as he generates a massive cloud of steam before vanishing.

He also retains his intelligence as a Titan, as shown on a few occasions.

Relationships

 * Reiner Braun - Reiner is his childhood friend, and partner in their mission against humanity. The two are rarely apart, and Bertholdt almost always follows along with whatever he decides. However, he's shown to be greatly bothered by Reiner's growing attachment to the others and mental problems. Even so, he rarely speaks up or takes any action to oppose Reiner.
 * Annie Leonhardt - Reiner suggests that Bertholdt has a crush on her, noting his tendency to always stare at her. In response, he blushes and offers a weak protest.
 * Ymir - He seems to have a mutual distrust of Ymir, acting wary of her and questioning whether or not she can be trusted. Likewise, Ymir does not seem to have much trust in him (or Reiner) and even physically threatens Bertholdt in order to get her way. However, after discussing the death of Berik with her, he admits that while he isn't certain whether or not he hates her, he seems to forgive her past crime.

Trivia

 * In episode 2, a young Reiner and Bertholdt are in the crowd when the mission to reclaim Wall Maria is announced. This is an anime-only cameo.
 * The official site reveals his nickname is "Bertl".
 * In chapter 47, Reiner teases Bertholdt by suggesting that he should "confess his feelings" to Annie Leonhardt. However, at this time it is unknown whether there is any truth to this or not.