We are playing as the hunters yes. Witches are hideous because of their deals with the dark it transform their physical appearance, but use their power to keep a normal facade. It is possible that a character could've been conceived between a witch and a man granted she seduced him, but that character would be a black sheep. He/She would've had to be trained by a rouge hunter or a pretender since the order is a rule of two system, only allowed one apprentice. He/She would be recognized if they have the mark but are under extremely close supervision. The perk would be complete immunity against their magics but the witches would try to convert them to their way.