- Name: Shirai Saki (白井沙樹)
- Birthdate: September 28, 2000
- Birthplace: Niigata Prefecture, Japan
- Blood Type: A
- Height: 155cm
- Shoe size: 23cm
- Favorite Colors: White and Pink
- Something that you must do before going to bed: タオルのはじっこをさわること
- Item I can't live without: Underlay/Shitajiki (下じき)
- People you respect: Graduates (ex-members) of Sakura Gakuin
- One thing you want to challenge yourself: Bungee Jumping
- Something surprising recently: Nene-don's (Sugisaki Nene) short hair is cute
- Special Skill: Playing Drums
- Former member of idol group Sakura Gakuin (May 2013-Mar 2016).
- 3rd Talk Chairman (2015 Nendo).
- Sub-unit Purchasing Club.