all I can do is assure people that as of the current volume of the LN she has not expressed any romantic interest in her father and her father has another love interest lined up
I'm not gonna say an Usagi Drop is still impossible, they could pull something like "and then they find her and she's dead or already married or something" and then proceed to Usagi Drop
but yeah he basically takes on a parental role for Ange's two partners, then takes in two actual children as a caretaker, then LITERALLY adopts a demon, he has so much dad power
he has so much dad power