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Koyama Seina
Koyama Seina (小山星流) is an idol managed by Up-Front Agency as a member of Up Up Girls (Kakko Kari).
Profile
- Name: Koyama Seina (小山星流)
- Birthdate: June 2, 2001
- Birthplace: Tokyo, Japan
- Groups / Bands:
- Up Up Girls (Kakko Kari) (2020–)
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