CJ is a cloud-humanoid with white skin and a cloud-like head and "hair" that looks as if it's tied in a ponytail with a big bushy fringe on top.

She wears a red-orange and white-striped tank top, brown shorts, and small black boots. When upset or angry, her skin turns a reddish-grey and her entire body becomes a giant storm cloud. Her height is 5'8".

In "Real Date", it’s revealed CJ had many different hairstyles and clothing styles over the years, including: a tall flat-top, big pigtails with overalls, wild messy hair and a goth hairstyle and clothing/makeup.

As a little girl, as seen in "Daddy Issues", CJ wore her hair in pigtails and the fringe in it was worn lower.