Asmodeus is a large, vibrantly-colored, burly and muscular demon of a staggering posture. He has long arms and digitigrade legs, a broad upper chest and narrow waist, and a tuft of cyan rooster-like tail feathers that have three sickle tail feathers colored red, black, and ivory-white.

His head is colored dark blue with red and white head feathers sticking out from a tuft on his head, and he has large feathers running to his chest. He has glowing neon green eyes and mouth on his main head.