Shelly is a beige ammonite shell with a black aperture frequently seen on the right side of her head, although some artworks inaccurately depicts it on the left side. She has orange blush and two eyelashes underneath her eyes. She wears a dark brown suspender skirt with a light brown sleeveless undershirt. Shelly is an extroverted Toon, who enjoys talking about her interest in dinosaurs and other forms of prehistoric life, but she has other hobbies as well, such as sewing She is highly supportive and kind towards others, as hinted through her active ability, possibly due to the influence of her Toon Handler or natural energy.