
Quick answer — Minami Kurisaka voices Pipi Barlier in I'm in Love with the Villainess, Ralaire in I'm in Love with the Villainess, Yumi in Dr. Ramune -Mysterious Disease Specialist- and 3 more characters.
Minami Kurisaka voices Pipi Barlier (I'm in Love with the Villainess), Ralaire (I'm in Love with the Villainess), Yumi (Dr. Ramune -Mysterious Disease Specialist-), Fuuka Sasaki (The Dreaming Boy is a Realist), Olivia Sweet (Let’s Play), Riese (The Banished Former Hero Lives as He Pleases).
Pipi Barlier is voiced in Japanese by Minami Kurisaka.