Mahito
Mahito is one of the series' main foes as well as one of the strongest "Jujutsu Kaisen" characters. He is a Pseudo-Geto ally and an unregistered special-grade cursed spirit. He also serves as the group's head, overseeing Jogo, Hanami, and Dagon. His group's ultimate objective is to wipe off humanity and eventually replace it with cursed spirits. Mahito is a relatively new Curse, yet he is already a terrifyingly strong being.
He is less experienced and initially less powerful than Jogo because he is younger. Despite this, Mahito is significantly more advanced than what a Special Grade cursed spirit would typically be and shows rapid development in just two months.
He is incredibly intelligent and possesses a cursed skill that is very harmful. Mahito has amazing growth potential because he has frequently grown while engaged in combat.
He is extremely shrewd and imaginative, in addition to being quick on his feet. He overcame Kento in their one-on-one battle in the sewers, and he probably would have also defeated Yuji and Kento in their subsequent fight, except for Sukuna's intervention.
Mahito has the capacity to change souls thanks to his Idle Transfiguration Technique. In addition to being horrifying, it is also incredibly potent and has endless potential because he may use it to cure himself, alter his appearance, or disfigure opponents. While he is still learning how to use his Domain Expansion: Self-Embodiment of Perfection, he will be even more dangerous once he does.