
Quick answer — Aguri Onishi voices Ayumu Uehara in Love Live! Nijigasaki High School Idol Club, Karla in Don’t Hurt Me, My Healer!, Shisho in The 100 Girlfriends Who Really, Really, Really, Really, REALLY Love You and 4 more characters.
Aguri Onishi voices Ayumu Uehara (Love Live! Nijigasaki High School Idol Club), Karla (Don’t Hurt Me, My Healer!), Shisho (The 100 Girlfriends Who Really, Really, Really, Really, REALLY Love You), Beth (Black Summoner), Masato Sendou (Seirei Gensouki: Spirit Chronicles Season 2), Merielle Omui (Loner Life in Another World), Rena (AFTERLOST).
Ayumu Uehara is voiced in Japanese by Aguri Onishi.