Rank: Daleth (4) Male Member of the Abnormal Class. An extremely kind-hearted boy who can't say no to anyone. Sold to the Netherworld by his idiotic parents, he became the grandson of the great demon Sullivan. He attends the demon school Babyls while hiding his identity as a human. He is so close to Asmodeus and Clara that they are collectively known as the 'Iruma Army.'

Rank: Daleth (4) Male Member of the Abnormal Class. A top-of-the-class honor student demon who excels in fire-based magic. Since the entrance ceremony, he has sworn loyalty to Iruma and accompanies him everywhere, becoming an irreplaceable 'friend.' Coming from a lineage governing destruction and virtue, he possesses a noble sense of etiquette, but shows a completely different, fanatical side when it comes to Iruma.

Rank: Gimmel (3) Female Member of the Abnormal Class. A cheerful and bright girl demon who is also restless and noisy. Moved by Iruma's kindness, they became friends who understand each other's hearts. She is very close to her family and has five younger brothers and sisters. She loves her friends Iruma and Asmodeus.

The chair-demon of Babyls and one of the 'Three Greats,' the high-ranking demons considered closest to being the next Demon King. The one who brought Iruma to the Netherworld. He dotes on Iruma, his first grandson, while warmly watching over his growth. He has met Guest, Derkila's sister, in the past.

Sullivan's excellent butler. They handle everything perfectly, from housework to bodyguard duties. Basically dry and stoic, but they watch over Iruma and provide accurate, sincere advice when he is in trouble. They have cat-like ears and a tail, with red hair tied in a braid.