- Name: Hidaka Marin (日髙麻鈴)
- Birthday: December 1, 2003
- Birthplace: Kanagawa Prefecture, Japan
- Blood Type: O
- Height: 150cm
- Footsize: 23.5cm
- Favorite Food: Sushi, Macaroon, Avocado, Tomato
- Things that you like?: Tap Dance
- Special Skill: Singing in English, Speaking English, Tap Dancing, Swimming, Cartwheel, Listening to Music, and Watching Movies and Musicals
- One thing you do before going to bed: Look at a picture of Sakura Gakuin and say "good night"
- If you were to be born again: Rakusa Tribe of Heart no Hoshi (Marin is referring to Sakura Gakuin)
- Hobby: Looking up into the sky
- One Thing you wish can come true: I want to become a mermaid!
- Biggest failure so far: Went to the wrong lesson venue.