Fumus is described to be an "old man" with a very sadistic personality. Though he is not the strongest god in terms of physical strength, he is very strong mentally and good at driving others into corners. This is reflected in most of his appearances where he is shown to enjoy torturing his creations. His usual victims are his subordinates, mainly his headangel Taffy. Fumus routinely assaults his angels in various ways. Fumus also tends to be very grumpy.