Lucifer Morningstar is a short, slender fallen angel with white skin, rosy cheeks, blond hair, red eyes, sharp teeth, and six feathered wings. He wears a white suit, striped vest, black boots, and an apple-topped hat. As Hell's king and Sin of Pride, he stands above its demonic hierarchy and is Charlie's father. Once a heavenly dreamer, he fell after giving humanity free will. Eccentric, theatrical, witty, and creative, he adores rubber ducks and grand performances. Beneath his pride hide loneliness, regret, insecurity, and fierce love for Charlie.

Lilith Morningstar is a tall, elegant woman with pale skin, long golden hair, refined features, dark horns, and a slender, curvaceous figure. She wears flowing violet gowns and carries herself with regal poise. As Hell's queen, Lucifer's estranged wife, and Charlie's mother, she was humanity's first woman, rejecting Adam before joining Lucifer in rebellion. Her powerful singing inspired Hell's demons. Independent, proud, charismatic, and enigmatic, Lilith projects calm authority, yet her absence and dealings with Heaven obscure her true motives.

Charlie Morningstar is a tall, slender demon princess with pale skin, rosy cheeks, red eyes, fangs, and long blond hair tied in a ponytail. She wears a red tuxedo, bow tie, and trousers, revealing horns when angered. Daughter of Lucifer and Lilith, she founded the Hazbin Hotel to redeem sinners and challenge Heaven’s Exterminations. Cheerful, compassionate, theatrical, and idealistic, Charlie believes everyone deserves a second chance. Though naive, sensitive, and impulsive, she fiercely protects her friends and refuses to abandon all hope.

Eve is humanity’s second woman, created by Heaven after Lilith rejected Adam. Her known appearance is a slender, long-haired silhouette; her eyes, clothing, and present form remain unknown. As Adam’s new partner, she accepted the Fruit of Knowledge offered by Lucifer and Lilith, an act that unleashed evil into creation and helped bring about Hell. Eve’s personality remains unexplored, though her choice suggests curiosity and independence. Her fate, powers, and loyalties are mysteries, making her a pivotal but elusive figure in the Hellaverse. Potential Lucifer’s second wife and Lilith’s other lover.

Alastor, the Radio Demon, is a tall, slender sinner with beige skin, sharp yellow teeth, a fixed grin, red eyes, deer ears, small antlers, and crimson hair. He wears a red pinstriped coat, monocle, bow tie, and gloves, carrying a microphone staff. Once a New Orleans radio host and serial killer, he became a feared Hell Overlord who broadcast his victims' screams. Now aiding Charlie's Hazbin Hotel for his own amusement and schemes, he is charming, theatrical, sadistic, cunning, proud, and controlling, hiding menace beneath impeccable manners.

Blitzo is a tall, lean red imp with yellow eyes, sharp teeth, striped black-and-white horns, a pointed tail, and white burn scars across his face and body. He wears a dark coat, skull-marked shirt, gloves, and boots. A former circus performer, he founded I.M.P., a Hell-based assassination business, and adopted the hellhound Loona. Skilled with guns, knives, and acrobatics, he is reckless, foul-mouthed, sarcastic, and fiercely protective. Haunted by a deadly circus fire, he masks guilt and fear of abandonment with jokes, bravado, and sabotage.

Loona is a tall, athletic hellhound with gray-and-white fur, shaggy silver hair, pointed ears, red eyes, sharp fangs, and a bushy tail. She favors a black crop top, shorts, fingerless gloves, and a spiked collar, adopting a pale human disguise on Earth. Once abandoned, she became Blitzø’s adopted daughter and I.M.P.’s sarcastic receptionist, occasionally tracking targets and fighting with claws and heightened senses. Moody, cynical, rebellious, and socially awkward, she hides insecurity and fierce love for her father beneath a hostile exterior.

Stolas is a towering, slender owl demon with dark blue-gray feathers, a white facial disc, glowing red eyes, a sharp beak, and long, elegant limbs. He favors royal capes, ornate robes, a crown, and refined accessories. A prince of the Ars Goetia, he commands celestial magic, studies astronomy, and once possessed a grimoire enabling travel to Earth. Intelligent, theatrical, affectionate, and emotionally sensitive, Stolas struggles with loneliness, his broken marriage, and his love for Blitzø. Beneath his aristocratic poise lies a devoted, vulnerable father.

Octavia is a tall, slender teenage owl demon with gray feathers, a pale heart-shaped face, pink eyes, a small beak, and long, dark hair-like plumage. She wears a black beanie, oversized dark clothes, and gothic accessories. Daughter of Stolas and Stella, she is an Ars Goetia princess caught in her parents’ bitter separation. Quiet, sarcastic, withdrawn, and sensitive, she loves astronomy and music but fears abandonment. Though she loves her father, his troubled romance with Blitzø leaves her feeling neglected, angry, and uncertain of her place.