Join Date: 19 March 2014
Graduation Date: 5 May 2014
Notes: Out of the initial eight members Rio made it the furthest without actually leaving a lasting mark on the group. She did take part in the first practice, first photo shoot, first cheki shoot and had her information on the website. She was also included in issue 18 of TRASH-UP!! which introduced the group even though she had left due to poor physical condition 10 days before the magazine went on sale.