Mai Sawaguchi (沢口 麻衣 Sawaguchi Mai) is a very responsible second year high school student who has tomboy tendencies. She falls in love with Reo after getting to know a different side of her. She is the ideal person to open up problems, as everybody opened up to her. She serves as the main protagonist and narrator of the third and fifth games.
Mai has shoulder length purple hair and red-violet eyes.