One of the surprising revelations that came during the series Jujutsu Kaisen is the fact that Suguru Geto, antagonist in both Chapter 0 and the regular opera, is actually different from what was seen in the prequel with Yuta Okkotsu. This is due to the implantation of a speaking brain in the body of Geto and Noritoshi Kamo.
The secret that was surrounded before the wizard's identity in the brain The one in question was finally revealed in the final chapter of Gege Akutami's work, and it even appears to have been given a name. In the final chapter, Yuji Itadori, Megumi Fushigoro, and Yuta Okkotsu pledged to come up with precise plans before starting the culling game, including the task of finding Master Tengen and getting as many answers as possible to various questions.
During the conversation with Tengen, the latter reveals to the protagonist that the real name of the wizard who first inhabited the body of Noritoshi Kamo and now lives in that of Geto is Kenjaku. Master Tengen also explained the reasons for organizing the culling game, as Kenjaku himself wants to throw the world into chaos in order to destroy it.
Naturally Kenjaku's story remains, at least in part, incomplete and most likely it will be deepened later, especially given the signs that Yuji's mother has on her forehead, just like those of Kamo and Geto. Recall that Megumi received a great female cosplay, and we'll leave you up to the possible season two release dates.