Nomu is a large, black humanoid monster with a very muscular body that has many scars on it. His brain is exposed on the top of his head, while his large eyes are around it. He has a beak-like mouth with an array of sharp teeth. He only wears a pair of beige pants and metal knee-pads designed to emulate skulls. His feet and torso are left bare. Before his transformation, Nomu had the appearance of a regular human with light olive green hair and thick lips.