Befitting the sin he embodies, Mammon is very egotistical and greedy, and he doesn't care for the well-being of others, only caring about how much he can profit from them to indulge his own greed. Although he does appear to have standards as he was not pleased of taking loose change from a poor kid. Mammon acts friendly in front of his audience just to look the part and treats Fizzarolli like a son. From what Fizzarolli has stated, Mammon is also a perfectionist. As his brand face, Mammon wants zero flaws in his brand figure whatsoever. He is also abusive, forcing Fizzarolli to do many stunts that put Fizzarolli in danger, such as being a living target for knife-throwing. However, Mammon also seems to show genuine concern over Fizzarolli when he starts having a panic attack, although it quickly changes to him looking threateningly and demanding for him to "get his shit together".