Mikasa Ackerman ミカサ・アッカーマン is the adoptive sister of Eren Yeager and one of the two deuteragonists of the series, along with Armin Arlert.
After her biological parents were murdered by human traffickers, Mikasa was rescued by Eren Yeager and lived with him and his parents, Grisha and Carla, before the fall of Wall Maria. She is the last descendant of the Shogun clan that stayed on Paradis Island, thereby related to the Azumabito family, and holds significant political power in Hizuru.
Though she desires only to live a peaceful life, Mikasa entered into the military—where she is considered the best soldier among the 104th Training Corps. She later enlists in the Survey Corps to follow and protect Eren, becoming one of its greatest assets. She is currently serving as an officer (上官 Jōkan) in the Corps.
Mikasa is a fairly tall, physically fit, and well-toned woman with muscles lined throughout her arms, legs, and abs. She is of partial Asian heritage, with pale skin, gray eyes, and shaggy black hair that was long until she cut it to chin-length. By the year 854, her hair is shorter and cut up to back of her neck, but with noticeably longer bangs. There is a small scar below her right eye delivered by Eren's Titan during the Battle of Trost District. Jean considers Mikasa to be beautiful.
Mikasa often wears the original Survey Corps uniform whose equipment is horizontally at her hips, with a white blouse underneath and a black scarf which she almost always has.[15] She also wears a green cape with the wings of freedom on the back during some missions.
When off duty, Mikasa's casual attire consists of a simple knee-length white dress, a light cardigan, brown boots, and her signature black scarf.
While in Marley, Mikasa wears a black Survey Corps uniform which features a breastplate with the Survey Corps symbol, many belts to accommodate all the different gear, support rods around her chest for the gas canister, and tall black boots. It also has guns, thunder spears, an additional gas tank, and canisters running vertically down her legs.
Before joining the Yeager family, Mikasa appeared to be a cheerful, outgoing, and gentle child. Her innocence allowed her to push anxious thoughts to the back of her mind, continuing to live with her parents and loved ones happy. Growing up, Mikasa has become emotionally withdrawn and noticeably dangerous, sometimes intimidating her enemies or even her comrades. She is quite stoic and level-headed, rarely seen to lose her cool or be at a loss of what to do, no matter how bleak the situation seems to be. Her will is remarkably strong, managing to remain so outwardly calm when Eren was presumed dead; only Armin could tell that she was battling with the pain of losing him.
Mikasa cares deeply for her friends and caretakers, seeing them as the last remnants of a family she cannot afford to lose.She also appears to have a soft spot for children, when she bowed to a young girl she saved and instantly saved a Marleyan soldier despite the latter having earlier killed one of her comrades. Mikasa is not completely immune to the effects of her emotions: Her strong feelings for her beloved ones, particularly when they are in harm's way, does at times cloud her judgment in fury - sometimes to the endangerment of herself and others. A notable example was when Mikasa briefly gave in to her grief over Eren's apparent demise and lost the will to live, forgetting her responsibility for the lives of the soldiers she took upon herself to lead in the process. However, she was reawakened by her memories of Eren and a made decision to never give up again, as her memories would die with her.