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, and has bandages wrapped around his entire body; only his face, hands, and feet are left uncovered. Dazai is smart, cunning, manipulative, calcultating, and a perfectionist. He is seen as cold, emotionless and heartless but he also playful, caring, possessive, and clingy. 