Mikasa Ackerman grew up isolated on a Shiganshina farm, her mixed heritage bridging an Asian mother and an Ackerman father. Childhood peace shattered at nine when traffickers murdered her parents and targeted her. Eren Yeager intervened, sparking her will to survive; she killed the last attacker, unlocking dormant Ackerman combat reflexes. He gifted her a red scarf, which she cherished as an emblem of hope. Adopted by the Yeagers, she forged unbreakable bonds with Eren and Armin Arlert, only to lose her second home during Wall Maria’s fall. Emerging as the 104th Cadet Corps’ top graduate, Mikasa mastered vertical maneuvering gear and battlefield strategy, her physical prowess earning prodigy status. Yet her focus remained fixed on shielding Eren, sometimes recklessly—ignoring orders to pursue the Female Titan or risking her life in Trost after falsely believing him dead. Her stoic demeanor concealed deep trauma-driven convictions: only the strong deserved to live. Emotional detachment fractured solely for Eren’s sake, seen when she tearfully embraced him post-Trost or raged against Annie Leonhart. Gradually, she expanded her trust to include Levi Ackerman and others, balancing personal devotion with collective survival. A wrist tattoo tied her to Hizuru’s Azumabito royalty, offering political leverage she rejected to stay on Paradis. Learning of her Ackerman lineage’s engineered protector role, she rebuffed Eren’s lie of genetic compulsion, affirming her loyalty as choice, not duty. Confronting his genocidal Rumbling, she accepted the unbearable task of ending his life, severing Ymir Fritz’s Titan curse. Clutching the scarf as he died, she honored their bond while acknowledging his duality. She later visited his grave for decades, the scarf remaining with her until her death. Mikasa’s appearance shifted from waist-length black hair to shorter styles, once adjusted due to Eren’s comment. A scar beneath her right eye, inflicted accidentally by his Titan form, marked her face. She typically wore Survey Corps attire with her iconic scarf, adapting to Marley missions with reinforced tactical gear and upgraded blades.