it seems that to everyone except MC her dad has been doting, mc doesn't have friends or a social life and neither does her dad apparently they're both awkward and cant socialize. Dad must have not realized he has a menacing aura, and the whole little kid stuff hasn't been explained yet, but this whole she changed and he stopped neglecting her isn't what's happening. in the past he was too awkward to understand that caring for her in the shadows wasn't good?? you can see by how he reacted when MC was barely conscious and sick but MC did not even remember him visiting at all. So it might be that he leaves before she wakes up. again this awkward dad doesn't realize that's a bad idea