muscular young man. as a fiend, his shark's snout and fin replace of the top half of his head. he has no visible eyes. He has short, spiky black hair and very sharp teeth. He exclusively wears swimming trunks. eccentric, naive and innocent. He often goes along with Denji's plans no matter how crazy they are, due to having alot of respect for him. He is shown to greatly enjoy fighting. He has enhanced durability, Intangibility, able to swim through solid objects.