The Campfire

Twilight stumbles upon a familiar mare sitting near a campfire alone. Who is this mare, and why does it look like she's waiting for someone?

While out hiking by herself, Twilight comes upon a mare sitting near a campfire. The mare looks familiar, but that isn't whats bothering Twilight. It's the fact that the mare's ears and head twitch towards any sound in the forest. Is she waiting for someone?