Dazai is a young man with mildly wavy, short, 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. On most occasions, Dazai is overly dramatic. Dazai likes to tease anyone and everyone, especially if it means that he can get a laugh out of it. Often attempts for laughs, but always fails.

First Consort: Fyodor Dostoyevsky
Second Consort: Osamu Dazai
Third Consort: Chuuya Nakahara