
Quick answer — Shiori Kurosaki voices Ouka Kawasumi in Grow Up Show, Mutsumi Kawaguchi in Bottom-Tier Character Tomozaki 2nd Stage.
Shiori Kurosaki voices Ouka Kawasumi (Grow Up Show), Mutsumi Kawaguchi (Bottom-Tier Character Tomozaki 2nd Stage).
Ouka Kawasumi is voiced in Japanese by Shiori Kurosaki.