The principal is usually shown outdoors wearing a cloak that covers him completely. When indoors or in lonely places, the director appears as a person with pale blue skin (somewhat different from the rest of the oni), white hair with blue streaks, as well as various markings all over his body. The principal has a kind and compassionate personality, and he tends to care for his students. The principal has a mysterious aura around him, as he rarely reveals himself to students who only know him by his voice, revealing his true appearance only to trusted individuals like Guest and the other teachers. His real name is currently unknown. He calls Guest his first name

Kyoya Oiranzaka is an Oni that works in the Kyoto branch of Oni Corporation as a commander of the support squad. His role is to aid Onis who got injured when they fought against the Momotarou Clan. He is a 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 since he loves to wear bracelets and rings and to some extent has piercings on his ears. He seems to be above average height. He's a calm and collected oni, despite his very stressful job, sometimes acting like he doesn't take it seriously. He's able to not get overwhelmed with the amount of oni he'll have to take care of, needing to keep cool within his "battlefield", as he describes to students like Shiki. He also a more bubbly and flirty personality, often flirting with Homare whenever he greets her or joking around with Guest even when he clearly doesn't reciprocate it. He calls Guest “Danny”