
Quick answer — Kaoru Sakura voices Koharun in The Lost Village, Chiko Sekino in Dropout Idol Fruit Tart, Haruka Tsukumo in Outburst Dreamer Boys (TV) and 2 more characters.
Kaoru Sakura voices Koharun (The Lost Village), Chiko Sekino (Dropout Idol Fruit Tart), Haruka Tsukumo (Outburst Dreamer Boys (TV)), Tsukiho Tsukumo (Outburst Dreamer Boys (TV)), Eru Amami (D_CIDE TRAUMEREI THE ANIMATION).
Koharun is voiced in Japanese by Kaoru Sakura.