Ryūnosuke Akutagawa is a member of the Port Mafia and has the ability Rashōmon. Akutagawa has a slim build and very pale skin. Akutagawa has a black and white "survival of the fittest" view of the world, claiming that weak people should die and give way to the stronger ones. He is not afraid of pain and defeat, if only to hear a word from a Dazai. Nonetheless, his composure is fragile.