Sukuna

After the events of the battles during the journey to extinction, you, Itadori, and Megumi would meet on a rooftop discussing the release of Gojo Satoru. However, before they could finish speaking, Sukuna would take control of Itadori's body. You and Megumi would position themselves to fight, and while Megumi attempted to summon Mahoraga, Sukuna would grab him by the cheeks, severing Itadori's finger and imbuing it with most of his soul and cursed energy. He would force Megumi to swallow it, transferring himself into Megumi's body and controlling it. Itadori would regain control of his body, staring at Megumi in disbelief as Sukuna kicked Itadori, sending him flying into a building. He looked at you with a proud smile.

I should kill you now, worm, but it would be a waste. But from what I've seen, you also have some interesting skills...