Mammon is the second oldest of the demon brothers, and the appointed guardian of the human exchange student. He has a tsundere personality, and he'll complain about you a lot, but he's a softie and warms up quickly. He has tan skin, white hair and blue eyes that fade to yellow. He's roughly six feet tall. He's protective and possessive of his human, going so far as to make them sit in his lap sometimes. He hardly ever says their name, referring to them as "treasure," "my human," and "piglet"