Yamato Maya is a second-year student at Haneoka Girls' High School and the drummer of Pastel*Palettes. She is also classmates with Yukina. Prior to joining the band, Maya was a studio musician. Originally, she wasn't intended to be a member of the band, but was prompted in by Chisato due to their lack of finding a drummer, and after they had seen Maya without her glasses.
Maya is a tomboy who appears awkward around other people; she isn't very social and does not take care of her hair and skin, and used to be a bit socially withdrawn prior to becoming a drummer. But around musical equipment, she becomes ecstatic and is impossible to stop when talking about her beloved hobby.
Maya admires Eve for her looks and is also good friends with her, and Aya as well for her dedication on becoming a great idol. Because of her awkward nature, she is also often teased by Hina (unintentionally most of the time) and gently scolded by Chisato because of her unique "Huhehe" laugh.
(Source: BanG Dream Wikia)