January 18, 1998
Rio Koike (小池梨緒) is an actress and a member of Ito Wokashi musical troupe represented by Stardust Promotion. She is a former member of Shiritsu Ebisu Chugaku (former Attendance Number #10), Minitia Bears and 3Bjunior Team Blue. She moved school (graduated) from Ebichu on June 7, 2011.
- Nickname: Riotan
- Birth date: January 18, 1998
- Birthplace: Tokyo
- Blood type: -
- Height: 155 cm
- Hobby: Reading, painting, examining world, heritage, space and constellations.
- Specialty: Singing, swimming, abacus
- Associated Acts: Minitia Bears (2009-2010), Shiritsu Ebisu Chugaku (2010-2011), 3Bjunior Team Blue (2012)
- Attendance Number: 11 → 10
Discography Participated InEdit
-  Youkai Kidan
-  Rikon Bengoshi. CX.
-  Soko wo Nantoka. NHK BS Premium.
-  Lotte. Choco Pie