25 years old / Theory Teacher / Gunpowder Committee Advisor He became a teacher at Ninjutsu Academy through Mr. Yamada's introduction and currently serves as the theory teacher for the first-year Ha-class. He is often run ragged by his students, frequently suffering from stomach pains as a result. Having lost his family at a young age, he shares a deep, family-like bond with Kirimaru, who is in the same situation. He dislikes fish paste products. He is Guest's husband.