Tamade Chiyu is a returnee who attends Celosia Girls' Academy, which is an international school. She is 14 years old but due to her excellent grades, she is a first-year high school student.

She goes by the stage name CHU² (チュチュ) (read as CHUCHU) and is the leader, producer and DJ for the band RAISE A SUILEN. She uses DTM (Desktop Music) to compose music.

Similarly to Kokoro, she is very rich and lives in a penthouse, where the band also practices at.