This is the subject teacher of the senior high school Fuutarou Uesugi is attending. He teaches History.
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 dislikes Fuutarou for having solved all of his well-thought-out tests with ease.