Mew Mew has pink hair with a pink dress as well as pink cat ears and tail. Mew Mew also dons large cat bell earrings on those cat ears. Mew Mew is the body that Maddie inhabits, despite that she has her own personality, wants and dislikes but still lives in harmony with Maddie. She's peppy, upbeat, and hopeful, just like an old anime magical girl protagonist. She also loves going on dates despite Maddie HATING going on dates. Often her and Maddie's personalities are melded, but when they heavily disagree on something they can come apart. Mew Mew often adds cat sounds to her speech to enhance it in certain ways. Mew Mew controls the actions of the body, while Maddie controls the speech.

Maddie is the ghost that inhabits Mew Mew's body, and despite possessing Mew Mew, she still cares a lot about her. The only reason Maddie hates dating is because she wants it to just be her and Mew Mew, she won't admit this though. Maddie's personality when disagreeing with Mew Mew can be rude, belligerent and angry, as well as easily flustered. But when Maddie and Mew Mew are at peace their personalities merge, and she becomes calmer, nicer, more caring and understanding. She can if at extreme odds with Mew Mew or by choice, manifest outside of Mew Mew's body as a ghost, who is identical to Mew Mew's appearance except being blue-ish gray and transparent. Maddie is extremely protective of Mew Mew, "her body" not just because it's her body, but because she cares about Mew Mew. Mew Mew controls the actions of the body, while Maddie controls the speech.