Norihiko Yokoya

Yokoya first appears in Round III, and is obsessed with domination. He is a calm, darked-haired man who is fond of carrying mice on his person. Nearco accurately describes him as Akiyama's greatest rival, and Nao senses something odd about him early in the game. According to Akagi, Yokoya substituted for another player in their Revival Round. The 8 other players agreed to give each other their votes to ensure Yokoya would lose, but for the first two rounds Yokoya bribed everyone's votes and got all 80 of them. He then sold his extra 29 votes to get everyone else's money. Except for the person most loyal to Yokoya, everyone was put in a 200 million debt to Yokoya. Yokoya let the loyal follower drop out of the Liar Game, and continues to control his teammates in Round III, setting up a dictatorship in the Northern Country. Although he plans to drop out with his winnings after Round III, Nao antagonizes him into proceeding to Round IV. Wikipedia