These days, it's not especially unusual to see somepony emerge from the woods. Although they're usually not quite this colorless. Or sporting such a cruel grin.
Fluttershy exhibits none of her usual body language today - no startlement at every sound, no interest in the local animal life, no habitual avoidance of the other patrons. Instead, she actually seeks some of them out - the ones who look like the most fun to torment.
And if she gets bored out here, there always seem to be humans inside.
[OOC: It's pony, Jim, but not as we know it. Specifically, this is a cruel version of Fluttershy. See
here for some detail and
these OOM posts for the canonical lead-up. But basically, expect that she'll try to be as mean to your pup as she knows how.
Incidentally, you're free to notice that she's gray, but she won't acknowledge it.]