Satou Masuki

 is a second-year high school student at Shirayuki Private Academy, an all-girls' Catholic school, which she has attended ever since kindergarten.

She goes by the moniker and is the drummer for the band RAISE A SUILEN. Her longing to become such a drummer like her father - who is the owner of Galaxy Live House - made her start playing the drums.

Appearance
Masuki has short blonde hair which barely reaches her shoulders, with a symmetrical fringe, as well as dark gold eyes.

Masuki wears a high dark gray pleated maxi skirt with a cropped black top, over which she wears a hibiscus red football jacket with white stripes and pictures of Hanyo Usagi on the front. She wears flat boat shoes with no socks. Masuki does not wear any jewelry or accessories.

Personality
Despite her sharp gaze and rough, delinquent-like appearance, Masuki likes cute things and is skilled at baking cakes. She is a straightforward but enthusiastic girl with a passionate heart.

She is a very skilled drummer, however, when she gets too immersed, she tends to fluster the other band members with her difficult improvisation performances, which made it difficult for her to join a band previously.

Game Interactions
A list of characters Masuki interacts with in the game (during Lives and in the dialogues at the end of every game).

Videos
Introduction (Japanese) =

Trivia

 * Because of her violent playstyle, she is called a.
 * She and Rei were work colleagues.
 * She has the same height as Kaoru.
 * Masuki's birthday, May 12, is the same date when RAISE A SUILEN (at the time, titled THE THIRD) played as the opening act for Poppin'Party's 5th Live, HAPPY PARTY 2018! during BanG Dream! 5th☆LIVE.
 * She owns a scooter license.
 * She dislikes waking up early.