Usagi-chan de Cue!!(2001)

Usagi-chan de Cue!! is a Japanese anime series following Mikami Inaba, a high school student whose life changes dramatically after a rooftop fight. When Mikami and her friend Haru are knocked off the roof during a confrontation, Mikami grabs a nearby rabbit and the two mysteriously fuse in a burst of pink light. The accident grants Mikami a second personality: Mimika, a rabbit-like alter ego who becomes her default form. Now Mikami only emerges when danger threatens her or her friends, while Mimika handles everyday life. The series blends comedy and magical girl elements as Mikami navigates school life split between two identities, each with their own strengths and quirks.