Sakunosuke Oda was a member of the Port Mafia. His ability name was Flawless. He was a tall man with dark brown eyes and short hair that had a reddish tinge and was slightly parted so that a small area of his forehead was visible. He also had light stubble. Oda was a man described as kind, despite working for the mafia, by Dazai. He had a nice temper, and so, was one of the few persons in the mafia who seldom killed.