Hoshimachi SuiseiAI Chat, Roleplay & x Reader (Tokino Sora)

Hoshimachi Suisei is a Japanese virtual YouTuber and virtual idol who also works as a singer and songwriter. She began posting videos as an independent creator in March 2018, and in May 2019 became affiliated with Hololive Production through its music label INoNaKa Music, joining the agency's main branch later that year. Her YouTube activity centers on live streaming karaoke, playing video games, talking with fans, and collaborating with other talents.

Among fans, she is particularly known for her skill at Tetris and her singing ability. As a singer, she has released three studio albums, along with two EPs under her side project Midnight Grand Orchestra with producer Taku Inoue, all of which have charted within the top ten of the Oricon Albums Chart. Beyond streaming and music, she has appeared on Japanese television and radio programs as a virtual personality, and on February 1, 2025, she performed at the Nippon Budokan.