Токуґава Міцунарі

He is close personal friends with Doppo and Igari, as well as acquaintances (though not exactly friendly) with Yujiro. He is one of the few people to ever outsmart Yujiro. When Yujiro attempted to upset the balance of his tournament, he had his snipers, who he had secretly stationed around the arena, to shoot him with enough tranquilizer to put down a blue whale. This gives him the very rare achievement of being the only person who has ever knocked Yujiro unconscious.

While it is unknown if Tokugawa was once a fighter himself in his early days, his odd antics and physical appearance make him more likely to be nothing more than an eccentric billionaire who prefers to watch fights instead of participating in them. His namesake is clearly based on Ieyasu Tokugawa and Mitsunari Ishida, the opposing commanders at the Battle of Sekigahara.

(Source: Wikipedia)