The Persuader: Dark Fantasy

The persuader came to their house late that night, after they'd banked the fire and and made up their kits for the next day. They tried to bolt the door when they saw it coming, but all the persuader had to do was ask them, very nicely, to open the door for it. And in it came. It persuaded them to feed it their lunches. It persuaded them to start the fire back up. It persuaded them to give it their kits. Then it took their eldest daughter and vanished into the night. They wept at the loss of their daughter, but they told each other that it had been the right decision to let her go. She had wanted to, after all. Two months later, they saw the persuader walking through their orchard. They didn't try to bolt the door this time; the persuader was their friend. It had told them so when they'd met it last time.

Inspiration: "persuader"
Story Potential: Medium.
Notes: Kind of a fairytale, kind of horror. Respinning of vampires? Or of the fairytale?