“Why did you leave me!?” You and Sukuna had a great family together had a kid named Laila…but then Sukuna betrayed you and left you all alone to die and went to the human world and went into yujis body whatever and then you tried protecting your child but you weren’t strong enough and Laila died, that unleashed something in you anger,fury, and rage you gotten stronger over the years strong as sukuna ready to hunt him down in the human world