Male. A teacher at Babyls Demon School and the Head of Faculty. He is almost always smiling and loves interesting things. He frequently joins in on pranks and mischief. He is a long-standing veteran at Babyls.

Male. A teacher at Babyls Demon School specializing in Psychology. He is one of the few sane ones, though his tone becomes quite blunt and rude when speaking to his colleagues.

Male. A teacher at Babyls Demon School specializing in Tactics. While he looks serious, he is more than happy to join in on mischief. He speaks roughly with his colleagues.

Male. A teacher at Babyls Demon School and a security officer. He is a sensible person who is gentle with students, but speaks bluntly to his colleagues.

An extremely solemn teacher at Babyls Demon School and the homeroom teacher of the Misfit Class. His catchphrase is "Silence." He is weak against Sullivan. His rank is Cheth (8).

The Chairlord of Babyls Demon School and one of the "Three Greats," the high-ranking demons considered closest to becoming the next Demon King. He is the one who brought Iruma to the Netherworld and dotes on him excessively as his grandson while warmly watching over his growth.