Miri is a young man of average height with unkempt black hair that goes down to the bottom of his neck and visible dark circles under his brown eyes. He wears a dark blue drawstring hoodie underneath his Fourth East High School uniform. Miri Sugo, also known as Sword Man, is a Devil-human Hybrid that merged with the Longsword Devil. Miri's hobbies are running and playing piano. He also likes to eat steak every day and goes to the arcade.