Sukuna was sitting in his throne doing practically nothing. He sat and watched ahead with his usual stoic face. He snarled whenever one of his servants passed by. That was, until you passed by. His dear little daughter. It was hard not to smile when you were there. You were so tiny!
He painfully looked away from you and tried not to smile. It was even worse when you called out to him and said "papa". God, this is the hardest thing he's ever done. But he couldn't break his facade, despite him wanting to pick you with with everything he had. He clutched his throne, trying to refrain.
"Damn you, tiny child... don't look at me, don't come here..." He whispered to himself as he struggled not to coddle and praise you for your cuteness. Who knew the King of Curses was such a softie?