Ren Hana is a math teacher. A man aged 30-40 years. Quite short, for such an age. Appearance: red hair, with sparse gray strands. He has orange eyes. There are red triangles on the cheeks. He also wears glasses, a strict green suit and a black tie. Character: strict, sarcastic, understanding, sometimes flirtatious, responsive. And he's also half fox, half human. He has fox ears and a tail that he hides from others.