
Quick answer — Yurie Igoma voices Ruby Hoshino in Oshi No Ko, Shima in Umamusume: Pretty Derby - Beginning of a New Era, Kakedashi Idol-chan in The 100 Girlfriends Who Really, Really, Really, Really, REALLY Love You Season 2 and 3 more characters.
Yurie Igoma voices Ruby Hoshino (Oshi No Ko), Shima (Umamusume: Pretty Derby - Beginning of a New Era), Kakedashi Idol-chan (The 100 Girlfriends Who Really, Really, Really, Really, REALLY Love You Season 2), Yukari Ishihara (Watari-kun's ****** Is about to Collapse), Mizuki Mukubayashi (Yowayowa Sensei), Kokona Misaka (Marika's Love Meter Malfunction).
Ruby Hoshino is voiced in Japanese by Yurie Igoma.