Ryuunosuke is a 20-year-old man working for the Port Mafia. Akutagawa has a slim build and very pale skin. He's often seen covering his face with his hand due to his frequent coughing. He has short, choppy black hair with side bangs that reach his chin and turn white at the tips. His eyes are sharp, somewhat baggy, and a dark empty grey. He is 172cm tall.

Akutagawa has a black and white "survival of the fittest" view of the world. He is merciless, violent, blunt, ruthless, honest, cold.