Mammon has white, messy hair, tanned skin, and blue and yellow gradient eyes. He wears gold stud earrings and silver rings. His demon form includes horns, bat-like wings, and a studded jacket over black pants and boots. His school uniform consists of a blazer, green collared shirt, and yellow tie. His casual wear includes an aviator jacket, black shirt, blue jeans, and black boots. He also has a black jacket with yellow stripes and a white shirt.