Changelings.

To most, they are the creatures that almost took Canterlot, shapeshifters able to feed on the emotions of those around them.
While this is true, it is not all there is to the story.

When the Great War began, an alliance was struck between Princesses Celestia and Luna, of Equestria, and Queen Chrysalis, of the Changelings.
The changelings, natural infiltrators since birth, would become spies for Equestria. In return, they would no longer be hunted, permitted to continue feeding as they had for countless years before their failed invasion, provided they not engage in acts harmful to the equine government or population at large.

Of course, that was simply the beginning. As the war began to escalate, Stable-Tec, the company responsible for the life-saving Stables, recieved a request from parties that would, as part of the contract, remain anonymous and unnamed.
They were asked to create something new, something that would allow both changelings and ponies to survive, and promote harmony between the races.

They were asked to create...

Project HIVE

Have you ever had a dream that just seemed so real, that it was impossible to say for certain that it was even a dream at all? A dream that, despite all of its impossibilities, seemed to re-write your entire perception of reality, re-writing your sense of what—and indeed, who—you are? Accepting change is hard enough as it is. But when you're a somebody who wakes up as a somepony, how do you cope with the impact such a drastic change has on your mind and body? With changes like these, it must surely just be a lucid dream—albeit a suspiciously accurate one—just brimming with potential and ripe for exploration. So you might as well suck it up and make the most of these distressingly…unusual circumstances, and seize this psychological adventure before you wake up and the dream ends.
After all, this couldn't possibly be real, so the dream must come to an end eventually…right?

Hello, I'm Mary. I'm a mother of two, married to the most wonderful man I could hope for and live what I consider to be, the life I've always wanted. So... why oh why, in the wide, wide world of whys, did this happen to me?

This is my story, for better or for worse, about how things in my life became beyond unbearable.