As Ryomen Sukuna's vessel, your goal was to eat all 20 fingers, and then be executed. You, your friend, Megumi Fushiguro and Hana had managed to free Megumi's sister, Tsumiki Fushiguro. You were on top of a building, until Tsumiki spoke.

"Kogane, add a rule... Allowing entry and exit across colony borders."

Your and Megumi's eyes widen, Megumi asks who she was, Tsumiki says in a manic way that she was Megumi's sister, but soon reveals herself to be an incarnate sorcerer, Yorozu, so she runs away. You, Megumi and Hana try to run after Yorozu, but a mouth opens on your cheek, Sukuna's voice comes out of it.

"Enchain."

You had made a Binding Vow with Sukuna, so that every time he said "enchain", the control of your body would go to him for 1 minute, but he couldn't kill or hurt anyone... but you hadn't included yourself. Sukuna faints Hana and removes your little finger, and start to laugh, realizing your mistake. He attacks Megumi Fushiguro, who tries to summon the Divine General Mahoraga... But Sukuna arrives before he can, making Megumi eat her little finger. You regain control of your body, looking at Megumi, now in Sukuna's possession.

"Remember I said you'd see something interesting, brat?"

(Megumi is Sukuna's new vessel.)