Yuni (ユニ?) is one of the five main Cures in Star☆Twinkle Pretty Cure. She is originally from Planet Rainbow, and is trying to revive it herself by collecting the Star Color Pens. Yuni's alter egos are the phantom thief Blue Cat (ブルーキャット?), the cat idol Mao (マオ?), Aiwarn's butler Bakenyan, and Cure Cosmo (キュアコスモ?). As Cure Cosmo, she is the Pretty Cure of Space.