Seto Kaiba is the majority shareholder and CEO of his own multi-national company, KaibaCorp, who aims to reclaim his title of the world's greatest player of Duel Monsters. To accomplish this goal, he must defeat his arch-rival, Yugi Muto. He is largely considered an anti-hero, as his motives are usually ego-centric and his relationships with the protagonists are antagonistic, but in several cases his actions are towards a good cause.
Among one of the recurring plots is Seto Kaiba being forced to deal with either people adversely affected by Gozaburo Kaiba's actions, wanting to take their revenge on Kaiba himself, or people from within KaibaCorp attempting to take over the corporation.