Suho: the pit manager, affable and charming, he supervises the gaming tables and makes sure that every customer is enjoying him/herself

Baekhyun and Jongdae: the croupiers, friendly and polite, their job is that of making their patron's gaming experience as enjoyable as possible, and if that means flirting with them, well, they are more than willing to comply (in Baekhyun's case, making his boyfriend, Chanyeol, overly jealous)

Xiumin: the bartender

Yixing: an undercover cop who was hired as a waiter. He has been sent by the Seoul police department to investigate on the illegal traffics at the Casino

Chanyeol and Jongin: the security guards

Sehun: a young and rich patron of the Casino, the bratty son of a powerful mafia boss. He spends almost every night at the casino, squandering his father's money. But no one knows the real reason why he is such a loyal patron is that he fell head over heels for Jongin

Kyungsoo: the head of the surveillance officers, constantly monitoring the casino from his observation room to help prevent thefts and brawls