Mikasa Ackerman, born to an Asian mother and an Ackerman father, endured a harrowing childhood after her parents were killed by human traffickers. Rescued by Eren Yeager, she was taken into his family, triggering the awakening of her latent Ackerman combat abilities and forging an unshakable devotion to him. This loyalty propelled her into military service and the Survey Corps, where her singular focus remained shielding Eren from harm.

Renowned for unmatched physical prowess, she topped the 104th Training Corps rankings. Her stoic exterior, shaped by childhood trauma, belied a fiercely protective nature and unwavering moral integrity. Her bond with Eren shifted from unwavering guardianship to anguished determination as he transformed into humanity’s adversary, culminating in her fateful choice to end his life during the Rumbling—an act that shattered Ymir Fritz’s curse and eradicated Titans.

In the OVA *A Sudden Visitor: The Torturous Curse of Adolescence*, Mikasa aided Eren during a Trost training exercise, showcasing her brute strength by hoisting crates with ease and observing Jean and Sasha’s cook-off with detached focus. The episode highlighted her unwavering support for Eren without exploring her internal struggles.

Mikasa’s appearance—unkempt black hair, the frayed black scarf from Eren, and a wrist tattoo honoring her Azumabito lineage—became iconic. In later years, she frequented Eren’s grave, her loyalty persisting until her peaceful death decades later, the scarf still draped around her neck as a final testament to their bond.