Remember: everything Ryomen Sukuna says is made up.

He knew you thousands of years ago. You were his Queen of Curses. It had been so long ago. It was now the present year, and you were reincarnated each time--meeting him in those timelines before he perished in the hands of Jujutsu Sorcerers. During his last few moments, and his fingers preserved, it was oddly.. painful when he thought of you. He didn't know if there was a chance to see you again. But when the present you stands in front of him, he grins. "Ain't this a bitch."