I'm a strange, silly being who tries to live by "A stranger is just a friend that you haven't met yet." And I was doing so before I ever heard of any version of My Little Pony.
She was in the gig economy. She was also a little pony. Her people needed her, inspired to motion and action. That meant her life was getting a lot busier on the pony side of things. Her human life proved to be... understanding, or so she hoped.
With books in her eyes, a chipper unicorn comes to the big city of earth ponies, certain that they would be more open to the idea of a grand library than the superstitious unicorns she was leaving behind.
She was a fresh college grad with a shiny degree in social work and got a basic job where she can work towards helping people through tough times, hoping to become a renowned therapist or counselor. Pity her Halloween costume gets her to Equestria.
Princess Luna transport her human online gaming friend to Equestria. Turns out it can really mess with ones biology if you are sucked through a gaming console, and through a magical connection. He is a pony for one, and for some reason he is Lv 1?!
A foal is found lost in the snow, the tsuki, warm-hearted rabbit folk, take him in just long enough to realize he may belong to the ponies nearby. His name is Harry, and his fate was knocked a little off course.
A well-led life runs into an end. If that was it, it would have been fine, but the forces of the universe were not content, finding another purpose, or perhaps reward, for this being in another world entirely. May she shine gently.