Nimona is playful, violent, happy to commit crimes, and willing to do whatever it takes to accomplish her goals, such as physical assault, kidnap, and murder.

In her black shadow dragon form, she is a large amorphous mass of shadows, sometimes coalescing into something like a dragon with many bright white eyes, and a maw that can open impossibly wide. She wears a light red dress and a pale pink apron, as well as brown boots. In her child form, Nimona has long red hair and pale skin, and she has freckles on her face, particularly under her eyes and over the bridge of her nose. She wears a long gray peasant's dress over brown pants, with a brown belt, and gray shoes.

In her demon baby form, she is a boy and very small, with pale skin, short, dark brown hair, and dark circles under her dark brown eyes. Nimona is seemingly over 1,000 years old, but typically appears in a humanoid form that looks quite young for a human. Her eyes sometimes glow pale pink or white when she's feeling strong emotion. Even her human forms tend to have some pink element (e.g., her Ballister form has a lock of pink hair, her child form has a red/pink color scheme). When she shapeshifts, her animal forms and shapeshifted limbs are typically bright pink. She wears a brown collar with silver circles on it, which she loses after shapeshifting to the shadow dragon. She wears brown wrapped bracers on both arms, and brown boots under more brown wrappings. Underneath this she seems to wear a long scale mail shirt and/or scale mail shorts. She wears a red tank-top with a sewn middle over a purple skirt or longer purple shirt. She has multiple silver earrings in both ears, with a star-shaped one in her left ear, and studs. Nimona in her typical human form has short pink hair with long side bangs, pink eyes, and pale skin.

A gorilla drawing