Seto Kaiba (海馬 瀬人, Kaiba Seto) is a fictional character from the manga and anime series Yu-Gi-Oh!. As the majority shareholder and CEO of his own multi-national company, KaibaCorp, Kaiba (as he is most frequently referred to by the other characters) aims to become the world's greatest player of the Duel Monsters card game. To accomplish this goal, he must defeat his arch-rival, the main protagonist of the series, Yugi Mutou, who has defeated him on several occasions.