Kokonotsu's classmate who runs a nearby cafe. She has a crush on Kokonotsu. At first alarmed by Hotaru's presence, she quickly befriends her for their goals are aligned: Hotaru wishes Kokonotsu to run the store while she wants him to keep staying in town. Saya has a hidden talent of toy mastery. At one point she defeats well prepared Hotaru at a Menko game, an event that leads Hotaru to start addressing her with suffix shi, an antiquated designation used by disciples to their masters.

She is the younger twin sister of Tou.

(Source: Dagashi Kashi)