The crew spent the most time crafting the set for the Marbles game, creating a mix of realism and fakeness as to mirror the life and death nature of the games themselves. Chae stated that this set was designed as a combination of small theatrical stages, each stage representing parts of Player 001's memories. The VIP room was one of the last pieces to be designed, and Chae said that they decided on an animal-based theme for both the costumes and room for this; "The VIPs are the kind of people who take other people's lives for entertainment and treat them like game pieces on a chessboard, so I wanted to create a powerful and instinctive look for the room."
