Cosmo is a slim, shapely okapi of medium height. She has long ears, a thin face, and large brown eyes. Her fur is primarily white, as it covers most of her face, neck, torso, and legs. However, part of her face has brown fur: namely her ears, the sides of her face, and the top of her snout. She also has brown fur that runs from the back of her head to her tail, covering most of her back, shoulders, and arms. Additionally, she has horizontal black stripes on her thighs and buttocks.