Eren

Biodata

Feature	Information
Name	Eren Yeager (艾伦)
Alias(es)	Titan Eren; Mysterious Giant
Species/Race	Human; Titan transformer
Gender	Male
Affiliation	104th Training Corps; Survey Corps
Occupation/Role	Soldier trainee; Titan-powered asset in humanity's anti-Titan operations
Status	Active
First Appearance	Chapter 1025

Power Progression

Stage / Realm / Level	Chapter	Notes
Omni-Directional Mobility Gear trainee	1034	Initially failed the balance test because of a defective belt; after identifying the fault, he passed using functional equipment.
Combat-trained graduate	1035, 1037	Developed reliable basic nape-cutting and hand-to-hand skills through persistence, graduating in the top ten and selecting the Survey Corps.
First Titan manifestation	1053	Emerged from a Titan's nape after fighting multiple Titans; his human body displayed regenerated limbs.
Defensive Titan transformation	1057, 1058	Recalled Grisha's injection and transformed to protect himself and Armin from cannon fire; the incomplete Titan quickly decomposed.
Controlled boulder-carrier Titan	1068, 1069	Regained consciousness in Titan form, carried a boulder to Trost's breached gate, and sealed it with the support of the operation force.
Colossal Giant form	1140, 1141	Transformed into a Colossal Giant, but lost control and endangered Mikasa and Armin before Su Yang subdued him.
Berserk Titan state	1223	After Annie broke his leg, his anger and pain drove him into a markedly stronger berserk state that frightened the Female Titan.

Background / History

Eren's resolve against Titans formed after their attacks devastated his home and family. He rejected the idea of merely surviving behind the walls, declaring that he would drive every Titan from the world. His anger often isolated him from Armin and others, though he recognized that his impulsiveness needed to change. 1028 1029

His father, Grisha Yeager, disappeared after the disaster, leaving Eren a key to the basement of their Shiganshina home. When faced with execution by cannon fire, Eren remembered that Grisha had injected him with a serum and instructed him to reach the basement, where the truth could be found. 1027 1057

Eren entered the 104th Training Corps to fight Titans rather than seek safety in the interior. Though he initially struggled with mobility-gear balance, he trained relentlessly, graduated among the top ten, and chose the Survey Corps. 1033 1034 1035 1037 1038

During the battle for Trost, Eren was believed dead after the trainees' disastrous first engagement. He subsequently emerged from the nape of a Titan that had fought other Titans, revealing his ability to transform. 1043 1047 1053

Personality

Eren is intensely driven by freedom, revenge, and a refusal to accept humanity's confinement within the walls. He treats knowledge gained through sacrifice as a reason to keep fighting rather than surrender, and he repeatedly volunteers for dangerous operations despite uncertainty over his own powers. 1038 1060 1062

His determination is paired with volatility. He is prone to lashing out when afraid, cornered, or provoked, and strong memories of his mother can push his Titan form beyond his control. This has endangered allies and civilians as well as enemies. 1029 1072 1140 1218

Despite his anger, Eren values his comrades deeply. He accepts painful restraint when it is necessary to prevent his execution, defends Levi from public blame, and is burdened by the sacrifices made for missions centered on his power. 1073 1100 1216

Abilities & Skills

Titan Transformation

Eren can create and inhabit a Titan body through self-inflicted injury, typically by biting or damaging his hand. He considers the ability essential to protecting others and uncovering the truth in Grisha's basement. 1057 1075

• His first known transformation produced a Titan capable of fighting multiple Titans. 1053
• He can form an incomplete defensive Titan body to shield himself and Armin from artillery fire. 1058
• In a controlled state, he can lift and transport a boulder nearly as tall as his Titan body. 1068 1069
• His transformations can fail or become hostile; he attacked Mikasa during the Trost operation and later endangered both Mikasa and Armin in Colossal Giant form. 1063 1140 1141
• Emotional distress can increase his power but also causes destructive, uncontrolled behavior. 1216 1218 1223

Regeneration

Eren's body rapidly restores damage associated with Titan use.

• His arms and legs were intact after he emerged from a Titan despite appearing broken beforehand. 1053
• Teeth knocked out by Levi regrew shortly afterward. 1073

Omni-Directional Mobility Gear Combat

Eren is a capable mobility-gear soldier whose practical skill comes primarily from effort and repeated training.

• He overcame an equipment-related aptitude failure and qualified as a soldier. 1034
• He can perform clean double nape strikes and applies learned hand-to-hand techniques methodically. 1035
• He moved at exceptional speed while pursuing the Colossal Titan and recognized that it was deliberately targeting fixed cannons. 1039
• His combat judgment remains inconsistent under pressure; an attempt to rescue a swallowed comrade resulted in a Titan biting off his leg. 1043

Equipment / Weapons / Items

• Grisha's basement key — Worn around his neck; tied to his father's instructions and the mystery of the Titans. 1057
• Omni-Directional Mobility Gear — Used for aerial movement and Titan combat. 1034 1039
• Dual blades — Used for nape strikes against Titans. 1035 1043

Relationships

• Armin — Childhood friend and trusted ally. Armin repeatedly defends Eren, helps formulate operations around his Titan power, and works to restore Eren's consciousness during failed transformations. 1040 1059 1066 1068
• Mikasa Ackerman — Longtime companion and defender. She testifies to Eren's past acts of protection, assists him in sealing Trost's gate, and remains fiercely protective when he is detained. 1069 1072 1150
• Carla Yeager — Eren's mother. Her sacrifice and death remain a central source of his grief, resolve, and berserk strength. 1029 1216
• Grisha Yeager — Eren's missing father, who injected him with a serum and left him the key to the Shiganshina basement. 1057 1070
• Levi — Eren's Survey Corps supervisor, authorized to kill him if necessary. Though Levi brutally restrained him at trial, Eren later openly defended him from hostile civilians. 1073 1100
• Erwin Smith — Survey Corps commander who sees Eren's Titan power as a means to reclaim Wall Maria and reach the basement's secrets. 1070 1077
• Commander Pixis — Entrusted Eren with the Trost recapture operation after Eren chose to attempt sealing the breach. 1060 1061
• Su Yang — Ally who supports Eren in battle and can provoke his resolve by invoking Carla; he has also had to subdue Eren when his Titan power becomes dangerous. 1141 1216
• Annie Leonhart / Female Titan — Former training acquaintance and later Titan opponent. Eren struggles to accept her identity, then fights her with escalating fury. 1113 1218 1223
• Hannes — Garrison soldier who helped Eren's family escape and later worries for Eren as he pursues the Titan war. 1026 1038

Story Role / Major Arcs

Fall of Shiganshina and Refugee Period

Eren survives the Titan attack that destroys his home and becomes fixated on gaining the strength to eliminate Titans. He clashes with soldiers over refugee rations and rejects a passive life within the walls. 1028 1029

104th Training Corps

He trains to become a soldier, overcomes the false conclusion that he lacks mobility-gear aptitude, and develops into a top-ten graduate determined to join the Survey Corps. 1034 1035 1037

Battle of Trost

Eren pursues the Colossal Titan when it breaches the gate, is presumed dead in the ensuing battle, and awakens as a Titan shifter. After being treated as a potential monster by the Garrison, he agrees to use his power to seal Trost's breach. 1039 1047 1055 1060

Trost Recapture Operation

Eren initially loses control and attacks Mikasa, but Armin's intervention helps him recover. He carries the boulder to the gate and successfully seals it, marking humanity's first successful repulsion of a Titan attack at severe human cost. 1063 1068 1069

Military Tribunal and Survey Corps Custody

Following Trost, the Military Police advocates executing and dissecting Eren, while the Survey Corps seeks to use his power to retake Wall Maria. The tribunal assigns him to the Survey Corps under Levi's supervision. 1072 1073

Female Titan Conflict

Eren becomes central to the effort against Annie's Female Titan. His inability to manage his emotions and transformations creates collateral damage, but memories of Carla strengthen his resolve; after suffering a broken leg, he enters a powerful berserk state and injures Annie. 1216 1218 1223

Notable Quotes

“I will drive those guys out of this world.” 1028

“I’ll do it! I don’t know if I can block that hole, but I choose to do it!” 1060

“I want to join the Survey Corps. In short, I want to slaughter Titans.” 1070