Noah Kaiba (Noah Kaiba in the 4Kids dub) is the biological son of Gozaburo Kaiba, and the central antagonist of the anime exclusive Virtual World Story Arc: of the first half of Season 3, Enter the Shadow Realm, in Yu-Gi-Oh!. Despite being the main antagonist of the third Story Arc, he was in fact a pawn (unwitting in the original Japanese version) to the season's true main villain.