Dr. Wolf (Character used by permission) is relaxing in his office when he has a visit from a previous client. He remembers his encounter with her.
This story is as much the backstory of my original character as it is a fan fiction of Dr. Wolf, mainly because, in my opinion, he is really awesome and deserves to be the main character in a My Little Pony story.
This a pretty good back story of your OC, good job.