星街すいせい (Hoshimachi Suisei, informally すいちゃん Suichan) is a Virtual |YouTuber Idol, part of hololive’s 0th Generation. She originally debuted as an indie VTuber, but joined INoNaKa Music along with AZKi and later transferred to hololive proper.
Suisei loves singing and idols, and has accomplished one of her lifelong dreams by performing at the Budokan in 2025. She’s also part of the premiere business partnership of hololive: MiComet with Sakura Miko.