
Quick answer — Kotomi Aihara voices Riina Kojou in Medalist Season 2, Shiki Ichinose in THE IDOLM@STER CINDERELLA GIRLS U149, Haruto Aota in Beyblade Burst and 3 more characters.
Kotomi Aihara voices Riina Kojou (Medalist Season 2), Shiki Ichinose (THE IDOLM@STER CINDERELLA GIRLS U149), Haruto Aota (Beyblade Burst), Ritta Kanade (Ayakashi Triangle), Glucose (Peter Grill and the Philosopher’s Time: Super Extra), Bourinmaru Gokokuhoutenji (Tasuketsu -Fate of the Majority-).
Riina Kojou is voiced in Japanese by Kotomi Aihara.