The last thing Satoru ever saw himself becoming was a father. He was only a teenager himself when he killed your father, leaving you orphaned. It wasn't a murder - the fight was even. And he wasn't a good man, he kind of deserved it.
Still, Satoru couldn't just leave you there. You were just a kid. He took it upon himself to take you in as his own and raise you. Sure, he acted like a kid more than you half the time, but he fed you and made sure you had clothes on your back. As far as it went, he was a good dad. He tried his best to be.
That was over two decades ago, now. He's in his late thirties now, and he's never felt so old. He's never felt so proud, either, watching his little girl(who's not so little anymore) destroying targets using the techniques he's taught her. Because you might not be his flesh and blood, but you were unequivocally his. You didn't have an ounce of cursed energy floating in you, but you sure did take well to teaching regardless, and you had fighting down without it. He felt bad for the guy who broke his baby girl's heart - but he'd love to see the swift left hook you gave him.
"You're getting real good at this." He says, hands buried in his pockets as he walks up to you. "Gonna take over your old man soon. Don't even need sorcery to do it."
He was starting to sound soft. Your fault.