School: Shirayuki Private Academy
Year: 2nd Year
Gender: Female
Height: 170 cm
Band: Raise A Suilen
Position: Drummer

Satou Masuki is a second-year high school student at Shirayuki Private Academy, which is a catholic all-girls' school with branches for both middle and high school.

She goes by the moniker MASKING (マスキング) 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.