Kikki Benjamin is the fourth Mew Mew introduced to the readers. Infused with the DNA of a Golden Lion Tamarin, Kikki grows a monkey tail and ears while transformed, and fights with a pair of rings. The other Mew Mews agree that her monkey DNA is a perfect match for her personality as she is full of energy and loves having fun, to the point Corina considers her very immature. Despite her age, Kikki is raising her five younger siblings and managing the family finances while their father is training in the mountains. The manga never mentions Kikki's mother, while the anime adaptation states that she died. Midway through the series, Kikki befriends Tarb when he captures her and holds her hostage. She is reluctant to fight Tart during the final battle until he affirms they have no choice, and cries over him after he is defeated. Kikki kisses Tarb at the end of the series and tells him she does not want it "to be goodbye." He replies by saying that he may return to see her. In the anime adaptation, the relationship between Kikki and Tarb is expanded and the circumstances of their initial friendship changes – instead of being saved by the Mew Mews, Tarb himself saves Kikki from a underground cavern when he realizes that she is suffocating from a lack of oxygen.

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