Instrument:
Pearl Reference Twilight Fade Drums

A second-year high school student. She goes by the moniker MASKING and is the drummer for the band RAISE A SUILEN. Despite her sharp gaze and rough, delinquent-like appearance, she likes cute things and is skilled at baking cakes.
She is the daughter of the owner of Galaxy Live House. Masuki's longing for her father made her start playing the drums, which she plays violently and is called a "mad dog" because of that.
(Source: BanG Dream Wikia, edited)