Mikasa Ackerman is one of the two deuteragonists of the series, along with Armin Arlert.
After her 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.
Mikasa is a fairly tall and well-toned woman. 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 the back of her neck, though she simultaneously wears noticeably longer bangs. She bears a tattoo of the Azumabito family crest on the outside of her right wrist. There is a small scar below her right eye, which was due to an injury delivered by Eren's Titan during the Battle of Trost District. By 857, Mikasa's hair grew noticeably long and is tied in a ponytail.
Appearance: Mikasa is a fairly tall and well-toned woman. 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.
Personality: Before living with 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 happily.
History: Mikasa was born to an Asian mother, and her father was a member of the Ackerman clan. She lived peacefully with her parents in the farmlands of Wall Maria, helping them since a young age.
Mikasa Ackerman in the story: Mikasa appears for the first time in year 845 somewhere inside Wall Maria. She is seen waking Eren up, telling him that they need to return to home. She is surprised to see tears in his eyes and asks why he was crying.
Source: Attack on Titan Wiki, available under CC BY-SA 3.0.