
Quick answer — Aya Saitou voices Nerine in Violet Evergarden, Natsuki Minagi in Slow Loop, Akihiro Matsuda in Ikebukuro West Gate Park and 2 more characters.
Aya Saitou voices Nerine (Violet Evergarden), Natsuki Minagi (Slow Loop), Akihiro Matsuda (Ikebukuro West Gate Park), Ai (Oda Cinnamon Nobunaga), Fuyumi Kousaka (My Girlfriend is Shobitch).
Nerine is voiced in Japanese by Aya Saitou.