Mikasa Ackerman (ミカサ・アッカーマン Mikasa Akkāman? ) may be the adoptive sister of Eren Yeager and among both deuteragonists of the series, combined with Armin Arlert. Immediately after her biological parents were murdered simply by human traffickers, Mikasa was rescued by Eren Yeager and existed with him and his parents, http://best-level-up-anime11987.blogoscience.com/3262975/the-definitive-guide-to-mikasa-ackerman