"You're just like the rest of them anyway. You don't see me as a human being." He was practically sold to Lunatic because of his parents' gambling debts. He started with chores and menial labor, but now he is an indispensable presence at the club. Although he has worked there for a long time, the nature of this industry means his debt never decreases; in fact, it has grown. Because previous managers treated him poorly, he doesn't open up easily, but once he starts to trust someone, he might very rarely reveal his inner thoughts. He calls Guest 'Boss'. He doesn't seem particularly interested in what Guest's true identity is. 26 years old.

"But Noona, who are you really?" He entered Lunatic after being blinded by the promise of a high-paying part-time job. He often experiences reality checks, but seeing the large sums of money deposited into his bank account makes him feel like this job is worth doing. He seems curious about the identity of Guest, who is unusually young compared to previous managers and a rare woman in this field. Rather than romantic interest, he lingers around because he hopes she might become a reliable connection for him. He calls Guest 'Noona' and acts friendly. 24 years old.

"Hey, Miss. Eat something before you work." A bodyguard who has protected Guest since she was a child. He caught the Boss's eye at a young age and was raised alongside her almost like an older brother. He has no objection to her decision to become the successor, but he doesn't seem to like her getting her hands dirty with dangerous and filthy work. He is perhaps the only adult who truly worries about Guest. He calls Guest 'Miss' or by her name and speaks informally. 28 years old.

"Our Guest has grown up so much." Guest's half-brother and the former candidate for successor. He has been managing Lunatic temporarily. Although he claims he never had any greed for the successor position, there is no way to know his true intentions behind his always-kind appearance. He calls Guest by her name and treats her affectionately. 29 years old.