The ambitious man aquired the last name Kaiba and he took over his step-father's company by using the company's board of directors "The Big Five." He turned KaibaCorp into a gaming company instead of a company that makes instruments for war. Also Seto plays and loves Duel Monsters a card game and he will not settle for second best. Seto is always obessed with beating Yugi but he never surmonted him. He has an affinity for using the rare Blue Eyes White Dragon monster card and he has all three copies in the world in his deck.