[BANDORI] Yamabuki Saaya is a third-year student at Hanasakigawa Girls' High School and the drummer of Poppin'Party. She became good friends with her classmate Kasumi during their high school entrance ceremony, and since then they eat lunch together every day. Outside of the band, she is friends with Tomoe, whom she gets along with well because they're both older sisters and drummers, and with Moca due to her being the self-proclaimed number #1 fan of Yamabuki Bakery. She also works part-time at RiNG together with Kasumi.