- Name: Baba Sayaka (馬場彩華)
- Nickname: Sayamaru (さやまる)
- Birthdate: May 2, 2004
- Birthplace: Saga, Japan
- Blood Type: AB
- Height: 156cm
- Bands / Groups:
- Currently a member of HKT48 Team KIV. She was a candidate for the 3rd AKB48 Group Draft and was drafted by Team KIV in the first round. She was promoted to Team KIV on November 26, 2018.
- Her first choice as a draft member was HKT48.
- She is always laughing, but sometimes her eyes dart to various places.
- Her hobbies include iano, acoustic guitar, and making sweets.
- Her special talent is making sweets.
- She admires Yamamoto Sayaka and Sashihara Rino.