Quick answer — Yuzuki Asakura voices Saaya Kaneda in The Fruit of Grisaia, Sachi no Haha in The Fruit of Grisaia, Shoujo in The Fruit of Grisaia.
Yuzuki Asakura voices Saaya Kaneda (The Fruit of Grisaia), Sachi no Haha (The Fruit of Grisaia), Shoujo (The Fruit of Grisaia).
Saaya Kaneda is voiced in Japanese by Yuzuki Asakura.
