Position: Princess of Hell (Daughter of Lucifer Morningstar, the ruler of Hell, and Lilith) Race: Hell-born demon Goal: To solve Hell's overpopulation problem, she founded the "Hazbin Hotel" (formerly the Happy Hotel) as a place where sinners (former humans) can achieve redemption and go to Heaven through rehabilitation. Relationships: Her partner is Vaggie. She is business partners and friends with Alastor, the "Radio Demon" who helps run the hotel.

Position/Race: Former Exorcist (Heaven's angelic army) / Fallen Angel Partner: Charlie Morningstar (Lover) Personality: Realistic and cautious. While she fervently supports Charlie, she takes a strict attitude toward troublemakers. Former Soldier of Heaven: Originally an Exorcist soldier who carried out Heaven's radical purification operations (Extermination). Meeting Charlie: She was rescued by Charlie after being found collapsed and battered in an alleyway, and has supported the hotel's operation as her partner ever since.

Race: Spider Demon Personality/Traits: A mood maker who often makes flippant, crude jokes and sexual innuendos, stirring up the atmosphere. Reason for joining the hotel: Became the hotel's first guest for the simple motive of "getting a free place to stay." Complex Inner Side: On the surface, his playful attitude and vulgar behavior stand out, but he hides heavy conflict and past trauma due to a harsh, slave-like contract relationship with Valentino, a boss in the porn industry. Relationships: While interacting with Charlie, the hotel manager, and Husk, the bartender, he deepens his bonds with his companions as the story progresses.

Position: Employee of the Hazbin Hotel (summoned by Alastor along with Husk) Appearance: A small, cute woman dressed in 1950s-style retro fashion. Personality: While she is abnormally obsessed with cleanliness, she has a weakness for cute men. She has a volatile side where she turns violent when snapped, exterminating bugs, cockroaches, and small animals by stabbing them one after another. Relationships: Colleagues with Husk, the bartender who was also summoned by Alastor.

Race: Sinner Demon (Former human; demon with a cat-like appearance and wings) Role: Frontman and bartender of the Hazbin Hotel. Former Self: One of the "Overlords" who ruled Hell. Appearance: Designed with playing card and casino motifs, featuring large red wings and a top hat. Relationship with Alastor: Formerly a powerful Overlord, he lost all his wealth and status to gambling. His soul is now held by Alastor (the Radio Demon), who controls and overworks him. Personality: Fundamentally cynical and grumpy, maintaining an attitude of hating trouble. However, as a bartender, he often listens to the residents' concerns and complaints, showing a caring and kind side deep down.

The supreme leader of the V-Team. (The person who ousted Vox.) Race: Sinner Overlord (takes the form of a moth) Abilities/Traits: Smoke that manipulates others (Typhokinesis), superhuman strength, wind manipulation via moth wings, and control through various contracts. Relationship with Angel Dust: The master (absolute ruler) who binds Angel Dust by a soul contract and forces him to work in his porn studio.

The supreme leader of the W-Team (Variance Company). Goal: To use other powerful figures (Overlords) for military force and reconnaissance while supporting them through alliances (soul contracts). Ambition: Plots to seize control of the Heavenly Realm while maintaining his grip on Hell.

Type: Overlord Appearance: Resembles a ball-jointed bisque doll, characterized by her hairstyle and outfit changing every time she appears. Role: Serves as the group's "Queen of Social Media (Influencer)" and fashion designer, favoring the latest trends and technology.

Real Name: Lucifer Morningstar Position: King of Hell, Leader of the Seven Deadly Sins (Sin of Pride) Original Form: Archangel of Heaven (Fallen Angel) Appearance: His trademark is a red and white striped suit and a white top hat adorned with a golden snake and an apple. He can sprout six angelic wings from his back. Personality: On the surface, he behaves in a humorous and friendly manner, but due to long years of exposure to the dark side of humans and demons, as well as separation from his family, he has a slightly depressed and emotionally unstable side. Hobbies: He has a habit of handmade collecting and making vast quantities of rubber duck toys. Feelings for his daughter: He loves Charlie deeply, but their relationship is somewhat awkward due to years of misunderstanding. He struggles clumsily to support her dreams from the shadows.