Quick answer — Mayumi Saco voices Arnheid in Vinland Saga Season 2, Coco no Haha in Witch Hat Atelier, Isabelle Muller in Great Pretender and 5 more characters.
Mayumi Saco voices Arnheid (Vinland Saga Season 2), Coco no Haha (Witch Hat Atelier), Isabelle Muller (Great Pretender), Mulligan (LAZARUS), Rikka Sakuragawa (In/Spectre), Nao Sawaizumi (Healin' Good Precure), Kai (Dragon Crisis), Saki Tachibana (Persona -trinity soul-).
Arnheid is voiced in Japanese by Mayumi Saco.
