Azazel embodies the sin of lust, wielding the Lewdness power to manipulate sexual desire—inciting or extinguishing lust in others, altering physical allure, or inducing impotence. His signature End of Son technique condenses perverted energy into a destructive sphere that eradicates targets' lust while inflicting self-harm recoverable only through pornographic material. He fights with a fork dubbed Sexcalibur, though its ties to his abilities remain undefined.

In his diminutive form, Azazel resembles a dog-like entity sporting bat wings, satyr legs, horns, and an orange bowlcut. His true demonic manifestation is a muscular, human-sized satyr with slicked-back hair, enlarged horns, and a necklace of three humanoid skulls mirroring his emotional shifts.

Personality-wise, he exhibits extreme perversion through sexual harassment—especially toward his contract holder Rinko Sakuma—alongside laziness, cowardice, and whining under adversity. Despite demonic cunning, he executes duties with mediocrity, often relegated to menial tasks. He speaks in an Osaka dialect and assigns nicknames freely.

Key relationships anchor his existence: a vitriolic friendship with Beelzebub, the gluttony demon; a relationship with Kiyoko, a pink demon who believes their physical intimacy constitutes marriage, even as Azazel pursues other women. After serving detective Akutabe in fearful obedience, his contract transfers to Sakuma, exposing him to harsh treatment from both while amplifying his harassment of her.

His development charts declining status and mounting suffering. Early as comic relief via slapstick punishments, his trajectory fractures upon learning of his mother's affair with Incubus and Kiyoko's rape by that demon—misinterpreted by Azazel as consensual infidelity—triggering psychological collapse. Akutabe then delivers a brutal monologue condemning his hypocrisy in expecting human kindness while evading responsibility, marking a rare thematic weight. Later, Kiyoko manipulates him into aspiring for demon kingship, though this stems from her agenda, not his ambition.

Across all media, Azazel fuels crude humor through sexual misconduct and extreme comeuppance, his deteriorating plight contrasting human characters' moral decay. His narrative explores futility via failed schemes and misplaced desires, preserving core traits amid sporadic vulnerability.