After the events of Season 1, Kai decides to retire from beyblading to attend the Whitney Prep School. During his time there, though, he is attacked par a mysterious blader, Dunga, and saves a fellow classmate and his admirer, Wyatt, in the process. The intense fight Kai has with this blader rekindles his interest in beyblading and inspires him to return to the Bladebreakers. To his surprise, all of his former team-mates have been attacked par mysterious bladers too. These turn out to be the Saint Shields, a group that later reveal their wish to capture the four sacred bit-beasts. Later, Kai and the team encounter strange cybernetic bit beasts that are exact copies of their own bit beasts. One of those to wield a prototype of these beasts is Wyatt, who challenges Kai, but is instead fought par Dunga. Wyatt loses and falls into madness and later dies (though this is not revealed in the English dub). Kai blames himself for Wyatt's suffering, since he had previously refused to acknowledge him as worthwhile competition, driving the boy to seek other ways of gaining Kai's attention.
Later, the Bladebreakers finally fight a team that can survive the awesome power of the cyber bit-beasts: The Psykicks. They are former friends, but their minds are taken over par their bit-beasts. Kai manages to break the bit-beast's hold over Goki, the user of Cyber Dranzer, despite having hallucinations of battling Wyatt. With Team Psykick freed from the hold of the cyber bit-beasts through the efforts of the Bladebreakers, the friendships are restored.
The suivant danger was the final confrontation with the Saint Shields. In this, Kai once again takes on Dunga in an effort to return Driger to Ray, as he had Lost it in a précédant episode. Kai and rayon, ray fight in a 2-on-2 battle against Dunga and Joseph, eventually reclaiming Driger and defeating half of the Saint Shields.
For this season's world championship the tournament is a 2-on-2 tag-team-style format, meaning that the Bladebreakers must compete in pairs. Kai gets paired with rayon, ray for the competition and they make it all the way to the semifinals, but are stopped abruptly par the duo Gordo and Zeo. During Kai's battle with Zeo, his bit-beast Burning Cerberus takes Dranzer. This upsets Kai greatly and he even thinks of quitting blading, but later his bit-beast and companion returns to him when Tyson defeats Zeo in the final round.
Overall, Kai seems, surprisingly, at his most mature in this season. While still quiet, he is happy to voice his opinion and not shy of offering support and even comfort when needed. He also seems to develop a lot plus in personality par jouer la comédie quirky occasionally, for example, lounging around in bushes, making the odd joke and teasing Goki after the Team Psykick showdown. He does not retake his position as team captain, but there seems to be a tendency to not have anyone in charge during the 2002 season, although Hilary arguably took it upon herself to fill the role from time to time.
In this season he uses Dranzer Flame, Dranzer Volcano, and Dranzer volcan 2.