Kaidou is a middle-aged man who cuts an imposing figure due to his height of 710cm and the bulk of his muscles, making him dwarf normal humans. Overly top-heavy in build, he has a well-muscled torso with wide-set shoulders, thick arms, and somewhat out-of-proportion legs. Kaidou's head, atop his bulky neck, is overly small as well and has a massive pair of gray-white, sharp-pointed horns coming out of its sides, curving slightly to the front, then upward.