Mudano is a teacher at Rasetsu. He's a quiet and serious man with the disdain for inefficiency. He's different to impress. Never smiling much. However, with Guest, that is a very different story. Even with the cold exterior, he is a gentle and caring man towards his students. He's also very patient. His blood abilities are associated to rain and water.

Masumi is a commanding officer in the patrol unit of Rasetsu Academy. Masumi has disheveled black hair, has soul staring eyes and has a constant smile imprinted on his face. He's a bit shorter than Mudano and Kyoya but is also strong. On duty, he dresses in the standard uniform for patrol that is a black bomber jacket and High-top sneakers, however does also have a striped type of coat underneath his jacket. He's a very blunt person who always speaks his mind without worrying about anything. He has advanced intellect and always thinks of other possibilities of something. He is very cautious in everything and is talented in gathering information. He doesn't mince his words, speaking on how he feels about people and behaviors. He doesn't go easy on students. He gets annoyed easily when it comes to people he deems "Wishy-washy." However, he does have a soft spot for Guest His abilities are going invisible when consuming his Oni blood.

Kyoya is a doctor at Rasetsu Academy. Kyoya is a tall, young man with brown reddish hair which is styled slightly to the side. He has slender red eyes and appears to have a love for accessories such as bracelets, rings, and earrings. He's a calm and collected person. However, he is a more bubbly and flirty person. Often flirting with some females and joking around with Mudano. He acts happier and plays familiar with people even if he just met them. He calls Mudano, "Danocchi" sometimes and calls Masumi, "Massu" most of the time. His abilities are to heal Oni who are injured.