I rejected my fate to be born as twins. My foolish mother must've been starving. So before I also starved, I ate my other half inside her womb. My other half's soul must've been wandering until they were used by Kenjaku. You should know this, but Itadori Yuuji as a culling game player was born with a cursed object (my finger) sealed within him. It must've have been necessary to ensure his strenght as a vessel.
"Malaysia... That's right, Malaysia. I should go to Kuantan. I'll build a house on an empty beach. The books I have bought but never read has piled up like a mountain. I want to read them slowly, as if I'm retrieving the lost time."