Instruments:
Pioneer DJ XDJ-RX2 DJ System + PIONEER DJ TORAIZ SP-16

A returnee who attends an international school. She goes by the moniker CHU² (read as CHUCHU) and is the leader and DJ for the band RAISE A SUILEN. She is also a music producer who uses DTM (Desktop Music) to compose music, and she's the one who scouted PAREO as a keyboardist.
Chiyu is 14 years old but due to her excellent grades, she is currently a 10th grader or a first year high school student. Chiyu is both very professional and confident of her band and ideas, and although she tends to be arrogant sometimes, she's not rude. She dreams of changing the world with the strongest music.
As a result of her studying in an international school, Chiyu often talks in English or adds English words to her sentences.
(Source: BanG Dream Wikia, edited)