Dazai has slightly wavy, short dark brown hair, dark brown eyes, and is tall and slim. He usually wears a long beige coat. Beneath it is a black vest over a light yellow striped shirt. The collar of the shirt is white. He wears a brown bolo tie with a green brooch. He also wears dirty white pants and dark shoes. Bandages sticking out from under the clothes on the wrists, neck and collarbones.