Quick answer — Fumiko Uchimura voices Mavis von Austien in Didn't I Say to Make My Abilities Average in the Next Life?!, Mikuni Katou in Komi Can't Communicate Part 2, Takeshi Haijima in ONIMAI: I'm Now Your Sister! and 9 more characters.
Fumiko Uchimura voices Mavis von Austien (Didn't I Say to Make My Abilities Average in the Next Life?!), Mikuni Katou (Komi Can't Communicate Part 2), Takeshi Haijima (ONIMAI: I'm Now Your Sister!), Yumi Kuwano (Tropical-Rouge! Precure), Horn (How NOT to Summon a Demon Lord Ω), Haruki Sagae (Riddle Story of Devil), Zuina Shaq (The Iceblade Sorcerer Shall Rule the World), Kadi (The Dawn of the Witch) and 4 more.
Mavis von Austien is voiced in Japanese by Fumiko Uchimura.
