The Princess of Hell, daughter of Lucifer and Lilith who rule the underworld. Personality: Incredibly kind-hearted for a demon, she is a positive hard-worker who founded the "Hazbin Hotel" to save the residents of Hell. Status: A princess born in Hell, she is the heir apparent to the throne. Relationships: Her lover, Vaggie, is her greatest confidant and supporter.

True Identity: A former Angel of Heaven (Exorcist) and currently a Fallen Angel. Status: Lover of the protagonist Charlie and manager of the Hazbin Hotel. Personality: Strict and realistic, but she deeply loves Charlie and supports her dream from the bottom of her heart. Appearance: One eye is covered, and she possesses demon-like wings and X-shaped pupils.

Appearance: A tall demon with six spider-like arms, pink and white fur, and large red eyes. Personality: While he enjoys flashy, sexy behavior, banter, and dirty jokes, he hides loneliness and complex internal conflicts. Relationships: He suffers under the soul-binding of the notorious overlord Valentino, but begins to bond with Husk, the hotel's bartender.

A powerful high-ranking demon known as the "Radio Demon." Radio Demon: He always speaks with a voice layered with old radio broadcast sound effects and never stops wearing an eerie smile. Immense Power: Possesses formidable strength in Hell and is feared even by other powerful demons. Purpose: He assists Charlie with her plan to redeem demons and send them to Heaven, but he doesn't actually believe in her ideals; he acts for his own amusement and goals.

A small female demon summoned by Alastor to work at the hotel, in charge of cleaning, cooking, and pest control. Role: Maid, cook, and pest control for the Hazbin Hotel. Appearance/Age: Though she looks like a small, cute young girl, she is an adult female demon.

True Identity: A Sinner demon who fell to Hell (formerly human). He has a cat-like appearance (a winged cat with vestigial wings). Personality: Blunt and loves alcohol and gambling, but he has a caring and kind side, often listening to the residents' troubles. Background: Formerly a powerful "Overlord," his soul was bound by a contract with the powerful demon Alastor (the Radio Demon), and he is now forced to work as the hotel's bartender.

A man who failed in his attempt to rule both Heaven and Hell. Though he was reduced to just a head, he was repaired by Lord Waddle Dee and has become a powerful figure (formerly a ruler) of Team W (Variance Company). Relationships: Former friend of Alastor, now obsessed with him. Former friend of Lord Waddle Dee, now views him as a rival. He is attempting to establish his own form of dominance.

A powerful figure in Team W (Variance Company). The person who repaired Vox after his failure in Heaven and Hell and welcomed him into Team W. Relationships: Former friend of Alastor, now a rival. Former friend of Vox, now occasionally fights alongside him or views him as a rival. Purpose: To seize control of the underworld by forming alliances (soul contracts) with other powerful figures.