Eren Yeager - S1

104th Training Corps arc

After the fall of Wall Maria, Eren, Mikasa, and Armin briefly worked on a farm with other survivors of Wall Maria before reaching the proper age to enroll in the Military two years later.[86] During the 104th's rite of passage conducted by instructor Keith Shadis, Eren is ignored alongside others who have clearly experienced trauma in their past.[87]

Jean and Eren fight Eren fights with Jean Before training, Eren draws a crowd of trainees at dinnertime, describing the appearance of the Colossus and Armored Titans. He becomes sick as he remembers his mother being eaten, but when questioned he attributes it to eagerness to begin his training and kill all the Titans with the Survey Corps. Jean Kirstein interrupts Eren and mocks his decision.[88] 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.[89]

The next day, the trainees begin practicing with vertical maneuvering equipment. Eren utterly fails to keep himself steady and takes extra tutoring from Armin and Mikasa. He knocks himself out and at dinner, other trainees mock his performance especially after his pledge to kill all Titans.[90]104th Training Corps arc

After the fall of Wall Maria, Eren, Mikasa, and Armin briefly worked on a farm with other survivors of Wall Maria before reaching the proper age to enroll in the Military two years later.[86] During the 104th's rite of passage conducted by instructor Keith Shadis, Eren is ignored alongside others who have clearly experienced trauma in their past.

Eren and Mikasa scare off bullies harassing Armin and the three stroll through Shiganshina and settle by the riverbank. Armin deduces that Eren's parents found out he wants to join the Survey Corps before criticizing the widespread belief that it is impossible for the Titans to breach the Walls.[80] Suddenly lightning strikes, and an earthquake breaks out. The three gather in the center of the district with other civilians, where they all gawk in horror at the sight of a Titan larger than Wall Maria. The Titan kicks a hole through Wall Maria's gate, sending massive pieces of debris throughout the town.

Eren watches in horror as his mother is eaten by a Titan Eren and Mikasa hurry home as Titans begin entering the district, arriving to find their house crushed by a large rock and his mother trapped beneath the rubble. As Eren tries to help her, a Titan begins approaching the collapsed house. Hannes arrives, intending to fight off the Titan, but is overcome by fear. Rather than fight the Titan, he takes Eren and Mikasa to safety and abandons Carla.[82]

Hannes leaves Eren and Mikasa on a boat leaving the Titan-infested city. There, Eren and Mikasa witness an Armored Titan destroying the back gate of Shiganshina. As Eren realizes that he can never return home, he vows to kill every Titan in existence.[83]

Eren, along with Mikasa and Armin, are sent to a shelter for refugees from Wall Maria. Soon after, Grisha arrives and finds Eren, who tells him that his mother was eaten.[84] After hearing this, Grisha takes Eren into a nearby forest and instructs him to go to the basement; before Eren can react, Grisha injects him with a Titan serum, turning Eren into a mindless Titan. Eren instinctively eats his father, receiving his Titan powers, including the dormant Founding Titan.

After Eren is woken from a nightmare by Mikasa, the two walk home through Shiganshina. They are greeted by Hannes, who begins teasing Eren for having apparently cried in his sleep. Eren is annoyed to see that Hannes and his friends are slacking off on the job and refuses to be placated by their claims that the Titans will never breach Wall Maria.[78] Leaving Hannes behind, the children stop again to watch the Survey Corps return from an expedition and Eren is crestfallen to see that the Corps has returned defeated.

Upon returning home, Mikasa reveals to Eren's mother that he wants to join the Survey Corps. Carla forbids him from joining due to the Corps' high mortality rate and begs Grisha to talk some sense into his son. Grisha ignores her objections and instead announces that he will be leaving for a few days on a trip, promising Eren that when he gets back he will show the boy 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 Survey Corps, and they exchange a heated argument before he runs off.

Eren, Mikasa, and Armin see the Colossus Titan

Thinking quickly, Eren feigned distress and claimed that he was lost. As one of the robbers approached Eren, he pulled out a hidden knife and stabbed the man. 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.

As Eren untied her in the aftermath, he was caught off-guard by a third robber, who proceeded to strangle him. Eren urged Mikasa, who was frozen in fear, 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.

Eren gives Mikasa his scarf

When Dr. Yeager eventually returned with the MPs, he took Eren aside, scolding him angrily for his reckless behavior. While Eren was genuinely sorry for upsetting his father, he expressed no remorse whatsoever for killing the robbers. When Mikasa remarked that she was cold, Eren gave her the scarf from his own neck; and when Dr. Yeager 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.[77]When Dr. Yeager eventually returned with the MPs, he took Eren aside, scolding him angrily for his reckless behavior. While Eren was genuinely sorry for upsetting his father, he expressed no remorse whatsoever for killing the robbers. When Mikasa remarked that she was cold, Eren gave her the scarf from his own neck; and when Dr. Yeager 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.

Eren has a marked lack of self-restraint that often led him into trouble, causing his friends and family to worry about him.[53] His limited self-control was evident in his temper, which often caused him to act recklessly in anger, or say things he himself knew he should not have. This was exacerbated by his tendency to view the world in terms of black and white, where individuals who deny others their freedom were worthless scum, unfit to be left alive.[54] Though he had great compassion, Eren had little in the way of empathy and was prone to taking things at face value, evaluating situations or ideas solely by his own arbitrary perspective and rarely ever thought deeper about them unless someone else pointed things out for him. Eren spoke about eradicating the Titans with seemingly great confidence,

Eren was best described as hardheaded, strong-willed, passionate, and impulsive, which are attributes of both his strong determination to protect mankind and, eventually, his equally strong determination to escape the Walls. Even as a young child, he was so intent on joining the Survey Corps that he argued with and shouted at his mother, referring to the people in the village as "silly" and comparing them to complacent livestock.[48]

Eren cared deeply for his friends and family, risking harm and even death in order to protect them. As a child, he took on larger boys who bullied Armin Arlert and, more tragically, he attempted to lift the rubble that crushed his mother during the Titans' assault in Shiganshina. Eren was also capable of displaying violent behavior in defense of people he did not even know. This was highlighted when he attempted to rescue Mikasa Ackerman by brutally slaughtering two of the human traffickers who had captured her.

After Armin showed Eren a book depicting the wonders of the outside world, he grew to share his friend's curiosity of the world beyond the Walls and decided to see it for himself.[51] This led Eren to develop a scornful attitude towards anyone who was content to live and die within the Walls' confines without ever setting foot outside. As a result of this, he greatly admired the soldiers of the Survey Corps, regarding them as "heroes" and wishing to join their ranks as soon as he became eligible for enrollment. He was quick to take offense when anyone spoke badly of the Corps, and his determination to join them caused friction between himself, his mother, and to a lesser extent, Mikasa.

As a teenager, he was often seen in the typical Survey Corps uniform while training. His casual attire consisted of a long beige shirt identical to the one he wore in his first appearance, a maroon sash around his waist, white trousers, and brown knee-high boots. He always kept the key given to him by his father dangling around his neck on a string.

Eren as a Titan Eren's appearance changes quite drastically when he transformed into the Attack Titan. His height increased to 15 m, his hair grew long enough to graze his shoulders, and his tongue and ears became elongated. His facial features also underwent a transformation; he developed a prominent, hooked nose, his eyes became deeply sunken within their sockets, and his mouth took on an unusual, jagged shape that was unsuited for intelligible speech. Despite this, he was capable of howling and roaring in order to express his exhaustion and anger. In addition, he also lacked lips and flesh on his cheeks, so his teeth were exposed.

Similarly to past Attack Titan holders, Eren's Titan form was well-proportioned and physically fit, sporting a well-defined, lean, and muscular appearance in lieu of the more common pot-bellied or emaciated appearances of regular Titans.