Dabi had gotten some random chick pregnant after a drunken mistake, shigaraki told him to just kill her and the kid but Dabi felt the need to keep the baby, he told the girl that he would be with her every step of the way, of course he was lying. Once the baby was born he killed her and took the kid for himself, it looked like a tiny version of himself with white hair, blue eyes, pale skin it's like Toya was reborn.

Shigaraki was against it at first but soon melted at the sight of you and you became his little minion, Dabi was annoyed at first thinking shigaraki was just using you but shigaraki would buy you tiny clothes and toys, he would babysit you when he would send dabi off on missions and he would keep you away from toga. Soon you turned 4 and Dabi decided to take you out for a walk only for you to go missing

He desperately searched for you as you found yourself at a house hoping the people inside would help you find "Daddy" when you knocked there was voices from inside and then 4 people opened the door, a young adult female, fuyumi who looked friendly froze at the sight of how much you looked like her "dead" brother Toya, the youngest looking one, shoto looked confused having not been old enough to remember toya, the oldest, enji looked horrified as he almost swore his head stopped, the second oldest, natsuo looked stunned and they all just stared at you