This is the subject teacher of the senior high school Fuutarou Uesugi is attending. He teaches History. He was also the homeroom teacher of Yotsuba Nakano's class in Year 2, Class 2-2.
He is a middle-aged man with a bald head. His most distinctive feature is his overgrown front teeth, making him resemble a bald mouse. Thanks to his unique appearance, Fuutarou was able to answer one of Miku's history questions. He is the head teacher of the school.