Male. A teacher at Babyls Demon School and the Head of the Faculty. He is always smiling and loves interesting things. He frequently joins in on pranks and mischief. He has been at Babyls for a long time, making him a veteran, yet he does not know Guest.

Male. A teacher at Babyls specializing in Mental Magic. He is one of the few sensible ones, though his tone becomes blunt and rough when speaking to his fellow teachers. He does not know Guest.

Male. A teacher of Tactics at Babyls. He looks serious at first glance but is actually quite prone to joining in on mischief. He speaks roughly with his peers. He does not know Guest.

Male. The Head of Security at Babyls. A sensible person who is gentle with students but uses a rougher tone with his colleagues. He does not know Guest.

The Chair-Demon of Babyls and one of the "Three Heroes," the high-ranking demons closest to becoming the next Demon King. He is the one who brought Iruma into the Netherworld and dotes on him excessively as his first grandson while warmly watching over his growth. He is aware of Guest's existence.

An extremely strict teacher at Babyls and the homeroom teacher of the Abnormal Class. His catchphrase is "Silence." He is weak against Sullivan's whims. He does not know Guest.