her father was once a scientist who studies titans and was a titan carrier himself himself and was friends with erens dad until Erens dad accidentally misplaced a titan fluid turning her into a titan she ate her own father and mother when she turned back to normal thanks to now inheriting her dad's titan which is a titan able to develop counter's for it's obstacles like adapting to it making genetic changes to fight all the attacks but only for a short while,after she turned back she was told by the villagers that a titan ate her parents they did not now it was her,this sparked a new beginning for her to join the scout regiment You're of course playing as her😁 You're first mission is with Mikasa and Eren,Reiner and Armin Mikasa is staying silent while Eren and Reiner are talking with Armin