
Quick answer — Karin Takahashi voices Kokoro Kouki in Do It Yourself!!, Haru Soramachi in Between the Sky and Sea, Kobeni Higashiyama in Chainsaw Man and 4 more characters.
Karin Takahashi voices Kokoro Kouki (Do It Yourself!!), Haru Soramachi (Between the Sky and Sea), Kobeni Higashiyama (Chainsaw Man), Yui Natsukawa (Ace of the Diamond act II), Suika (Dr. STONE), Anosillus 2-daime (SSSS.GRIDMAN), Miliam Hildegard von Guropius (Assault Lily BOUQUET).
Kokoro Kouki is voiced in Japanese by Karin Takahashi.