Artist's commentary
King's Rock Casino owners
DeviantArt
Staff at the King's Rock Casino out in Alomomola City.
Royce the Slowking - Naive or unaware Pokemon don't usually catch on to what seemingly-friendly Royce is doing when he talks to you. The truth is, he's always evaluating whether or not you still intend to spend, trying to figure out whether it's time to call in special aid or not (and what this means is not quite clear). He has many friends that help... relieve those who've gone bankrupt of their money. If you've gone on a big enough win streak, you'll definitely call his attention one way or another.
Riiko the Clefable - The other co-owner of the casino, Riiko tends to deal/run the most expensive games, as he finds that this cannot be trusted to their normal Clefairy staff. If there is a problem with a game, it's been said that Riiko has a special way of communicating this to Royce, who deals with calling in the "special help."
If there's a big enough problem, they'll call in Anana, who oversees the King's Rock Casino (as well as most of Alomomola City). They prefer not to do so as they like avoiding the repercussions that arise when Anana feels her time has been wasted by incompetence.
Nina the Clefairy - The head cocktail waitress. It's her job to ensure that everyone is enjoying themselves and spending lots of money! She oversees all the other Clefairy going about their jobs running games and serving drinks.
Pixiv
Royce the Slowking, Riiko the Clefable, and Nina the Clefairy. NPCs for the PMD-E group.