Kaiba played "Initially Kaiba had no intention of watching the final Duel between Yugi and Marik, but was confronted by Kaiba reconsidered and decided to help Yugi, despite hosting the tournament to beat him. Kaiba was unable to disqualify Leon as the tournament rules forbade him from interrupting Duels.Despite Leon losing the Duel, Zigfried believed the virus had done enough damage to destroy years worth of programming, but due to his earlier preparations, Kaiba was able to restore everything.Roland later informed Kaiba that Yugi and his friends had boarded a flight to Egypt. As he predicted, Noah betrayed them and split the gang up.Gozaburo was unwilling to give up and transformed into a monster and proceeded to attack Seto. Kaiba also seems to take great pride in the Duel Disks he developed as he would use them even when Duel Rings are nearby by plugging it into the Duel Ring's hologram projector so any card he plays on his Duel Disk is displayed on the Duel Ring instead of just using the Duel Ring. Although Kaiba may seem very unkind toward his brother Mokuba, he has a brotherly love for him. In the last of the quarterfinals Kaiba found out the eight finalist is Kaiba checked on the progress in translating "The Winged Dragon of Ra's" text. An intellectually gifted and innovative computer programmer, engineer, and inventor during his youth, he invented virtual software for playing video games as a young child prodigy. In every duel, he punctiliously implements an array of well executed high power dueling strategies into giving his opponents a hard time to strategically overpower him. He told them to jump off the KaibaCorp building and opened a gateway to the real world, which they passed through before hitting the ground. A competitive businessman and cutthroat investor, Kaiba also seeks to become the world's greatest player in Kaiba is largely considered an anti-hero, as his motives are usually egocentric and his personality traits are selfish and arrogant, but he does sometimes help Yugi and his friends if it’s in his best interest (although there are a few occasions where he helps Yugi when faced with a common enemy). Yugi returned Kaiba's Deck to him and suggested that they stick together as they are all going to Pegasus' castle, but Kaiba declined. Kaiba and Yami took an underground passage into the building. Kaiba, Yugi and Joey returned into temple to find Dartz. Kaiba threw the Millennium Eye to Atem, who was back residing in Yugi's body. Mokuba suggested that they host a tournament at the grand opening of the USA At the beginning of the tournament Kaiba jetpacked into the Kaiba Dome to introduce the tournament as the ultimate test of survival with Kaiba Land as its battlefield.With the tournament running too smoothly, Kaiba suspected the hacker must be already be in Kaiba Land and got Roland to perform a background check on all the competitors in the tournament.

Though Yami himself finds Kaiba's condescending attitude and arrogance quite infuriating. If Yugi could figure out how to use it, it would give him a 20% chance of winning. Present day Seto accused Noah of using the virtual software that Gozaburo stole from him.Seto and Mokuba were then sent to a beach, where they found a TV half-buried. However he met Kisara, who was able to see him and mistook him for Priest Seto. Seto asked Noah why he's making them watch this stuff. A one-stop shop for all things video games.

However Marik informed Yugi that his friends had been kidnapped. Yugi constantly holds out hope for him, as does Yugi's other self Yami. Joey protested that he went up against "Ra" before, but Kaiba reminded him how it knocked him unconscious. However, it might represent how he perceives himself and the "perfection" it would entail.The only people Seto has shown as much emotion toward is Pegasus and Yugi Moto; given that the former was decisively defeated in the arc he first appeared, it's more likely that he is addressing the latter, his eternal nemesis even through reincarnation.When Seto Kaiba was defeated by Yugi, it took time for him to reassemble his shattered mind.