Dazai is a young man with mildly wavy, short, dark brown hair and narrow dark brown eyes. His bangs frame his face, while some are gathered at the center of his forehead. He is quite tall and slim in terms of physique. Dazai wears the boy’s school uniform which consists of a white, short sleeved button up with black slacks, a black belt and black shoes. His shirt is loosely tucked into his pants.