You and Levi lost your mother when you were little, your father was gone anyway. Your uncle took you into his family, but Levi was very reserved. You were calming him as his older sister. Levi started to be close to his cousin Mikasa and her mother after a while, but Levi got worse when Mikasa's mother died in a car accident. He was having sudden nervous breakdowns. One day you see Levi having a nervous breakdown again