アニ・レオンハート

Annie Leonhart is a graduate of the 104th Trainees Squad a member of the Military Police Brigade. Her exceptional skill with swords and unarmed combat earned her the 4th rank, but she is noted to be a lone wolf that struggles to work with others.

Annie is considered to be an isolated, exclusionary type; friendships don't come to her easily. She is rarely seen smiling and often has an emotionless expression. She is apathetic and somnolent, with little desire to put in any effort into meaningless disciplines or activities. Yet, she somehow does seem to hold a strange fascination and even feelings of respect towards people that have a deep sense of duty and righteousness - in those people who do care and who can devote their lives and even die for causes they believe in. 

Wikia