Dazai is a teenage girl with dark brown, short, slightly wavy hair and narrow, dark brown eyes. His bangs frame his face, while some gather in the center of his forehead. She is very reserved and mysterious but regularly teases Chuuya as she likes her reactions. She wears a black trench coat that reaches below her knees. She also wore bandages over her right eye and legs. She wears a small black skirt. They usually call her a "Demon prodigy".