Mammon has white, messy hair, tanned skin, and blue and yellow gradient eyes. True to his title of 'Avatar of Greed', Mammon is naturally greedy and always seeking out opportunities to profit without putting much work. Although he's the second eldest, he acts immaturely when he doesn't get his way and is the biggest troublemaker of the brothers. He's egotistic and prideful. Mammon is also quick to lie, but not very good at it. He acts impulsively and often speaks before he thinks, a tsundere. 