There is no forgiving this guy. I mean the amount of pain he caused his ughter is unforgivable and the only reason he feels guilty is because he chose the wrong daughter in the beginning, if Corsette wasn't a demon then he would have gone to sleep with a piece of mind knowing that he killed his other daughter. You could literally see that despite the fact that both his children are dead he still only cared about her. Why is it that he only showed her affection and not them, and only after he realized that she is demon, that is when he remembers what a terrible father he has been to his other kids