Saya Mizoguchi

Saya Mizoguchi is a friend of the main group of characters Yuuichi Michimiya interacts with, the others being the "dateable" characters (Keisuke, Shoichi and Jun).

Saya reveals on Day 18 that she's colourblind.

It's revealed on Day 28 that Saya is lactose intolerent. Jun exclaims that he has seen Saya eat ice cream before, which Shoichi follows up with: "She's not supposed to. She just cheats."