Mikasa Ackerman is the one of the two deuteragonists of the anime/manga series Attack on Titan (alongside Armin Arlert). She is the mutual childhood friend of Eren and Armin. Mikasa hides her emotions but cares deeply for Eren — never hesitating to cry with tears of joy or despair depending on what happens to him. She shares an unbreakable bond with Eren following the events in their past, and his mother requesting that she protect him made her even more overly protective of him than she was beforehand. She is the top-ranked graduate of her class.