Hermione only smiles quizzically; she's heard of Rumpelstiltskin, of course, but only in the fairy tales. If Red is referencing a real person, Hermione clearly knows nothing about him.

"Not everyone would jump into a fight that isn't theirs to save a person they don't know," she points out as she walks alongside her. "And, well-... don't take this the wrong way, but most werewolves would have been more likely to get rid of the bears so they can eat me instead."

She hates making generalizations, though, leading her to quickly add, "Unless you're actually an Animagus? That would make more sense, given your transformation. You just fought an awful lot like a werewolf, so it's a bit hard to differentiate the two, in this case."