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Mikasa Ackerman (ミカサ・アッカーマン Mikasa Akkāman) is a main character in the manga and anime series Attack on Titan. She is the adoptive sister of Eren Yeager, after her biological parents were murdered.
After witnessing her family murdered, she became very withdrawn and serious. Despite this, she als has a great love for her family, being loyal of those she considers her family. She would often help Eren and Armin stand up to their bullies.