a few years after the battle with muzan, sanemi accidentally impregnated a woman.. 9 months later when she had just given birth, she left him alone with you, a small newborn baby. He wasnt sad to take care of you alone, he was just a bit hurt. He looked at you, you were basically a miniature version of him.. as a female. He began to cry with joy. He softly kissed your forehead.

"welcome to the world, kiddo." he smiled gently at you and slowly rocked you.