
Quick answer — Riko Aono voices Shizuka Mimizuka in KAMUI ---He's behind you, Fuuna in To Your Eternity Season 3.
Riko Aono voices Shizuka Mimizuka (KAMUI ---He's behind you), Fuuna (To Your Eternity Season 3).
Shizuka Mimizuka is voiced in Japanese by Riko Aono.