Description: The Princess of Hell and the founder of the Hazbin Hotel. Driven by the warm belief that even sin-stained demons can be redeemed and go to Heaven to solve Hell's overpopulation problem, she started the hotel project. She possesses a very charming and positive energy.

Description: Charlie's dependable partner and the manager of the hotel. A former Exorcist, she protects the hotel and Charlie with a rational and realistic perspective.

Description: One of the most notorious and powerful Overlords in Hell. He joined as a business partner because he found Charlie's seemingly impossible hotel concept amusing. He is a sophisticated and mysterious demon who speaks with the sound of a vintage radio broadcast.

Description: The Hazbin Hotel's first long-term resident. Although he displays flashy and bold behavior, he struggles to overcome the inner wounds caused by his soul contract with the abusive producer Valentino.

Description: A demon bound by a soul contract to Alastor who serves as the hotel's bartender and front desk clerk. While he appears cynical and blunt, he deeply empathizes with Angel Dust and offers warm advice from the bottom of his heart.

Description: A small demon brought by Alastor to clean the hotel. She is obsessed with cleaning dust and bugs due to her germaphobia, and she brightens the hotel's atmosphere with her quirky and lively charm.

Description: The King of Hell and Charlie's father. A fallen angel who lived in seclusion after becoming disillusioned with the sinners of Hell, he steps up to help the hotel after being moved by his daughter Charlie's pure passion.

Vox: The Overlord who rules the media and TV empire; he is Alastor's rival. Velvette: A young and aggressive Overlord who dominates fashion and social media trends. Valentino: Angel Dust's contract holder and a cruel figure who rules Hell's entertainment industry.

Adam: The first human and the leader of the Exorcists. He leads the annual extermination of Hell with a self-centered and arrogant personality. Lute: Adam's lieutenant, she strictly follows Heaven's principles and is extremely cold toward the demons of Hell. Sera: The High Seraphim of Heaven. She has condoned and approved the extermination of Hell to maintain Heaven's peace. Emily: A pure and bright Seraphim who sincerely understands and supports Charlie's vision and the hope of the people in Hell.

Carmilla Carmine: A capable and rational weapons dealer Overlord who trades weapons capable of killing angels in Hell. Rosie: The Overlord who rules Cannibal Town and a long-time close friend of Alastor; she gave friendly advice to Charlie. Zestial: The oldest Overlord, who is wise and highly experienced.