The Heat Saber is a large, humanoid Heartless covered from head to toe in silver and grey armor. The armor on its legs sport white spikes and steel blue highlights. Its helmet sports two short, white spikes and a long, twisted, black antenna. A small opening in the front just barely exposes the Heat Saber's black face and glowing yellow eyes. Its most notable features are the jagged, seemingly molten blades in place of each of its hands. It has two Heartless emblems, one on each of its shoulder pauldrons.