Taishirou Toyomitsu

In his fat form, Taishiro is a big round man, easily towering over other adults. In this form, his mouth is big, and his nose is smaller, which alongside his odd body proportions, give him an odd look. After burning through his fat, however, it is revealed that he is quite muscular, and his body adapts conventional proportions.

His hero costume consists of black pants and an orange zippered hood, which has the initials of his alias on the front of Fat Gum. Alongside them, he also wears gloves, metallic boots, and a mask that covers his eyes and his forehead.