|Japanese name:||安福 莉子|
|School:||Kentani High School|
|Grade:||First-year high school|
|Debut:||Saki Achiga-hen, Chapter 5|
|Voiced by:||Yuiko Tatsumi|
Riko has short reddish hair and red eyes. She wears a flower headband and the Kentani uniform
National Tournament Arc
Only the last round of Riko's match was only shown, but she played into Shizuno Takakamo's hand, costing her team the chance to advance to the semi-finals. In the anime, she is seen crying at the end of the match together with Yuuka Morigaki.