Also known as: 星街すいせい, ほしまちぎゃらりー, 古河七星, ほしまちギャラリー, miComet, みこめっと, ほしまちぎゃらり一, 星街彗星
A VTuber who originally started as an indie before joining Hololive's music label INNK Music. She later transferred to hololive proper and became part of hololive's "0th Generation (Hololive)".
Her appearance was designed by herself, as well as the costumes from her indie days. She got a new design from Teshima Nari after joining hololive, with her newer costumes being designed by Saekiyahiro.
As of March 22nd, 2026, she has started her personal agency titled "Studio STELLAR", although she will be working as part of hololive as well.
She has Blue Eyes with stars in them and blue Medium Hair with Double-Parted Bangs hanging between her eyes, Sidelocks and a Side Ponytail held with a blue ribbon.
Costumes
Regular costumes
- 1st costume
- New Year
- Casual
- Sailor
- STELLAR into the GALAXY
- Maid
- Shout in Crisis
- Oriental suit
- Spectra of Nova
- SuperNova
- 11th costume
- MiComet
Other costumes
- Old Design: indie and INoNaKa Music days
- Los Angeles Dodgers collaboration
- holoNatsu Paradise
Costumes shared with other members
- Origin
- Hololive Summer 2023 Swimsuit
- Bright
- Hololive Dance Practice Uniform
- Aogami High School Uniform
- Holohoneygaoka High School Uniform
- Color Rise
Units and groups
Original songs
- Awake (Hoshimachi Suisei)
- Bibbidiba (Hololive)
- Capsule (Hololive) (w/ Mori Calliope)
- Caramel Pain (Hoshimachi Suisei)
- Ghost (Hoshimachi Suisei)
- Kireigoto (Hoshimachi Suisei)
- Moonlight (Hololive)
- Primadonna (Hoshimachi Suisei)
- Requiem (Kanaria) (w/ Kanaria)
- Soirée
- Still Still Stellar (Hololive)
- Sugar Rush (Hololive) (w/ Sakura Miko)
- Syakunetsu Nite Junjou (Hololive)
- TEMPLATE (Hololive)
- True Girl Show (Hololive)
See also
- Anemachi ‒ her real-life sister
- Moku Seiko
- Sata An
- Super Idol Comet-Chan
- Takoyaki (Hoshimachi Suisei)
- THE FIRST TAKE
- Hoshimachi Suisei (Artist) for works attributed to her.
