
Quick answer — Yuko Sasaki voices Mari Mutou in Japan Sinks: 2020, Totsuko no Haha in The Colors Within, Akiko Tendou in Zom 100: Bucket List of the Dead and 3 more characters.
Yuko Sasaki voices Mari Mutou (Japan Sinks: 2020), Totsuko no Haha (The Colors Within), Akiko Tendou (Zom 100: Bucket List of the Dead), Katherine Royal (Space Adventure Cobra), Melusine Muses Mnemosyne (Tropical-Rouge! Precure), Kaka (Modest Heroes: Ponoc Short Films Theatre, Volume 1).
Mari Mutou is voiced in Japanese by Yuko Sasaki.