In his fat form, Taishiro is a large, round man, easily towering over other adults. In this form, his mouth is wide, and his nose is smaller, which gives him an odd look alongside his odd body proportions. After burning through his fat, however, it is revealed that he is pretty muscular, and his body adapts to 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, written with a clear F, G.