Eren Yeager is the protagonist of Attack on Titan (Shingeki no Kyojin), created by Hajime Isayama. His journey from an angry, traumatized boy in Shiganshina District to the orchestrator of a global genocide remains one of the most dramatic character arcs in manga and anime history. Eren witnessed his mother being eaten by a Titan during the fall of Wall Maria, and that moment of helplessness ignited a lifelong obsession with freedom and the destruction of his enemies. The series follows his transformation across four seasons and 139 manga chapters, culminating in one of the most debated endings in the medium's history.
Eren grew up inside the walls of Paradis Island, a society that believed it was the last remnant of humanity, surrounded by man-eating Titans. After the fall of Wall Maria, Eren enlisted in the military alongside his adopted sister Mikasa Ackerman and his best friend Armin Arlert. He graduated fifth in the 104th Training Corps and joined the Survey Corps, the military branch that ventures beyond the walls to fight Titans. During the Battle of Trost, Eren discovered he could transform into a Titan, a power his father Grisha had secretly given him by injecting him with Titan serum and allowing Eren to consume him.
The truth behind the walls unraveled over time. Eren learned that Paradis was an island nation of Eldians, a race capable of transforming into Titans, and that the outside world, led by the nation of Marley, considered them devils. The walls were built by a former king using the Founding Titan's power to erase Eldian memories and enforce peace through isolation. As Eren gained more memories from the Attack Titan, which has the unique ability to see the future memories of its successors, he became increasingly fatalistic, believing that the path to freedom required the annihilation of the outside world.
Eren's character shift from a hot-headed hero to a cold, calculating antagonist is the emotional core of the series. He infiltrated Marley alone, attacked the Liberio internment zone during Willy Tybur's declaration of war, consumed the War Hammer Titan, and founded the Yeagerists to seize control of Paradis. When he finally activated the Founding Titan's power through contact with his half-brother Zeke, he unleashed the Rumbling, sending millions of Colossal Titans to trample the outside world. His former allies in the Survey Corps, including [Levi Ackerman](/quiz/levi-ackerman/), were forced to oppose him to prevent total annihilation.
Mikasa Ackerman ultimately killed Eren by decapitating him inside the mouth of his Founding Titan, ending the Rumbling after approximately 80% of humanity outside Paradis had been destroyed. In his final moments, Eren revealed to Armin that his actions were driven by a tangled mix of motives: protecting his friends, securing Paradis's future, and an innate, irrational desire to see a world wiped clean. The ending divided fans worldwide but cemented Attack on Titan as one of the defining works of 21st-century manga, with over 110 million copies sold.
