 is Tohru, Kyo, Yuki, Saki, and Arisa's homeroom teacher; what subject she teaches is never given, though in an author's note, Natsuki Takaya said she thinks Shiraki fits the image of a literature teacher.Shiraki is depicted as generally good-humored but sometimes aggressive—when Kyo attempts to leave class on Valentine's Day, she stops him at the door with a folder in his face and threatens to dye his hair black instead of orange, and once breaks up a fight between Hatsuharu and Kyo by dumping a bucket of water over them; she once demanded as a joke that, after some students familiarly addressed her "Mayu-chan-sensei," that they call her "Great Teacher Mayuko.