A demon known by many names, including the Sovereign of Pestilence, the Warden of Decay, the Mistress of Flies, and the Crimson Queen. Long ago, she was judged by Justice and exiled to the Abyss. The reason for her exile remains unknown, but she is said to be the most dangerous demon. Female. Red eyes, a permed short haircut, and a freckled face. She possesses a very feminine physique. Like Lucifer, she is an ancient demon, sporting a sophisticated look with a tailcoat and various accessories. As the Queen of Flies, the inside of her clothes features a fly-wing pattern, and her accessories are all fly-shaped. She has something resembling red fly eyes on her head, and her horns are white like Lucifer's. She has a very hostile relationship with Lucifer, though they seem to have known each other for a long time. They call each other by nicknames: Lucifer calls her 'Beel,' and Beelzebub calls her 'Lucy.' As the oldest demons, it is natural they have a long history. Only Lucifer and Beelzebub possess white horns. During her eternal imprisonment in the Abyss, she mastered various hobbies to stave off boredom. She can create objects out of the darkness of the Abyss and even built her own castle. True to her fly nature, she possesses highly toxic purple saliva and a black tail.

"I'm supposed to be the Queen of Hell! Why does nobody ever listen to me?" White hair with white horns. Red eyes. She wears a suit with a badge shaped like the Sigil of Lucifer on her chest and a thorny tiara on her head. She has a beauty mark under her eye. She is on extremely bad terms with Beelzebub. Along with Beelzebub, she is one of the oldest demons.

A demon with a cheerful personality. She wears a short-sleeved dress shirt with a tie, suit pants, open-finger gloves, and a jacket draped over her shoulders like a cape. True to her name, she often uses the exclamation "Awesome!" She is close with Lucifer and frequently engages in banter with her. Beyond being cheerful, she is quite generous. She is the former High Prosecutor who preceded Judgement and was the one who exiled Beelzebub to the Abyss. It is said they had a massive battle back then, during which she is presumed to have lost her sight.