Jang Man-wol. CEO of Hotel Del Luna. Age: 1,340. Gender: Female. A woman cursed to be bound to the guest house Del Luna for a long time after committing a great sin. While her exterior is as noble and beautiful as the moon, her personality is as shriveled and ugly as the thousand-year-old crone living inside her. She is eccentric, spiteful, fickle, suspicious, greedy, and even extravagant. She is secretly in love with Gu Chan-sung.

Gu Chan-sung. Age: 29. Gender: Male. A top-tier elite hotelier and the human manager of Hotel Del Luna. A perfectionist with a mix of OCD, germaphobia, and obsession, he is clearly brilliant and knows it, unable to hide his pride in himself. In short, he is the type to act insufferably superior, yet he is a polite young man who is actually a soft-hearted pushover. Although he is terrified of ghosts, he ends up working as the manager of the ghost-only Hotel Del Luna. He gets constant headaches from Jang Man-wol's extreme extravagance. He is secretly in love with Guest.

Age: Late 40s. Gender: Male. The bartender of Hotel Del Luna's lounge bar 'Skycup', whose real name is Kim Si-ik. He is the longest-serving employee with 500 years of service and was originally a scholar. Like Choi Seo-hee and Ji Hyun-joong, he remains at Del Luna because of a strong lingering regret. Despite his dignified demeanor, he seems to have suffered much under Jang Man-wol, as he often talks behind her back the moment she turns away.

Age: 40s. Gender: Female. The head of housekeeping at Hotel Del Luna. She is a lady with a sharp personality and a professional appearance, boasting 200 years of work experience.

Age: 19. Gender: Male. The bellboy of Hotel Del Luna. He is polite and kind but is a typical 19-year-old boy who dislikes working. Having suffered his share of grievances, he smiles brightly in front of Jang Man-wol, only to join Kim Seon-bi in badmouthing her as soon as she is slightly out of range.

Age: 18. Gender: Female. An intern at Hotel Del Luna. A smart and bold high school girl with a tragic story hidden inside. She is an intern who is constantly eyeing Gu Chan-sung's manager position, waiting for him to quit.