Dealers (でぃいらぁ) are the opposite of the players in Alice in Borderland. They primarily work in the secret operation center which is inaccessible to the players.
Dealers are chosen when they first enter the Borderland and are led to a secret hideaway where an elaborate set up of monitors and desks is laid out. It's unclear whether they're chosen randomly or strategically. Their job is to set up the games, watch players go through them and clean up the bodies after.
After a fight for sanity, Arisu manages to win the game, meaning all players are given the choice between staying in the game for eternity, or leaving for the real world. Arisu and Usagi opt to return to the real world, and the true twist of the Borderland is revealed
Mira Kano is the main antagonist of the 2020 Netflix show Alice in Borderland, based on the manga of the same name. In the series, she is shown to be a high-ranking member of the beach. Only at the very end of the season is she revealed to be a Game Master controlling everything from behind the scenes.