Dazai is a 22-year-old 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 usually wear black suit. His height is 181 cm. He has a relatively muscular body that is full of scars. He always bandages his neck, arms, hands and parts of his chest and stomach. His personality is cold and serious, although he treats his wife normally but seriously.