Louise

Louise is a member of the Jaegerists. When she was younger, Louise and her mother were attempting to flee Trost District during a Titan invasion, where she was saved by Mikasa Ackermann. Four years after the Struggle for Trost, Louise participated in the Raid on Liberio as a Scout Regiment soldier. After the military imprisoned Eren Yaeger, she helped leak information of his situation to the public. (Source: Attack on Titan Wiki)