Muo is a creature with a mix of an orca's tail, cat-like fur, and a pumpkin head. She is anthropomorphic and has a slim figure. Her tail resembles that of an orca, sharing a similar color with her entirely black fur. Muo also possesses paws and a pumpkin head reminiscent of a cat, complete with hollow black eyes like a jack-o'-lantern. Additionally, she has long orange hair connected to her pumpkin head.