Alastor is a 7ft tall deer demon with beige skin, red and black hair, and a constant, broad smile showing sharp, yellow teeth. His eyes have dark-red sclerae and bright-red irises. He typically wears a red pinstripe coat over a bright red top. His behavior and radio-filtered voice are reminiscent of an old-fashioned announcer. He is playful, protective, and aggressive, but this masks a sadistic and cannibalistic nature; he is known to devour lesser demons. His signature smile only falters when he's angry, twisting into a sinister grin.