Roulette Boy (ルーレット小僧, Rūretto Kozō) Voiced by: Yōko Asada (Japanese); Mariette Sluyter (English) He is a small red-faced child with a roulette wheel on his head. He loves to play games and challenges guests to test their luck, usually ending in terrible mishaps and accidents for the players. For this reason, Gregory absolutely hates Roulette Boy as he's always haplessly landing on unlucky squares.