Kawaguchi Riko

 (河口莉子) is a member of OS☆K, and former member of OS☆U.

She joined OS☆U on January 15, 2023, and withdrew on February 27, 2023.

She joined OS☆K on October 7, 2023.

OS☆U

 * Name: Kawaguchi Riko (河口莉子)
 * Birthday:
 * Zodiac:
 * Hobbies: Listening to Music, Reading Mangas, Dancing, Sleeping, Going to Cafes and Talking
 * Special Skills: Badminton and Baton Twirling
 * Member Color: