I sighed. I hadn't eaten since the Breach started, so I went to SPP-294, a pony-shaped coffee machine-type thing. I looked at the keyboard and typed "Milkshake." I grabbed my milkshake and sat down to drink it when I saw the stalker again. I sat completely still and watched as he...got a beer. Didn't expect that. I sighed in relief and drank my milkshake, not caring whether or not it was dangerous. Afterwards, I began walking again.

After a while, I had a weird feeling near my flank, like something was inside, ready to come out. I then realized I had to take a dump. I sighed and went to the restroom, ignoring the sign that said "DANGER: CAREFULLY EXAMINE TOILET BEFORE USING."
I sat down on a random toilet and started to poop when I heard an evIl laugh. I looked down and saw a face in the toilet. I knew this was an SPP of some sort, but which one?
"I am the Flank Ghost," the face said, "and I will eat your flank." Oh. 789-J. That made sense. I shrugged and continued pooping, forgetting what made this SPP so dangerous.
After a while of pooping, I felt something on my flank. I screamed. 789-J got me!! I tried to twerk it off, but twerking didn't solve anything. In fact, it only made it worse. The lesson I learned there is don't twerk while something's eating your flank. I suddenly remembered how to get rid of this guy and reached for the toilet paper. I proceeded to wipe the Flank Ghost off of my posterior and threw him back into the toilet.

It had been five hours since I had almost lost my flank to a ghost. The hallways seemed endless, and I thought I'd never escape. I sighed and saw a peculiar containment chamber. When I looked inside, all I could see was darkness. I cautiously turned on the light, and what I saw surprised me.
I saw what looked like a strange grey, bald, genderless toy pony, sitting in a chair, looking down. I looked closely, and the toy looked up, staring at me with it's completely blue eyes. I screamed. What the f[potatoes]k?! I cautiously entered. The small pony was a little over a foot tall, the size of a newborn foal. It wasn't wearing a uniform, so it couldn't be a Class-F. I poked it gently. The pony looked up at me.
"What are you?" I asked.
The pony was silent. "Call me Ariel," it finally said.

Author's Note

So, from now on, I've decided to give you hints as to who the mane character is. Hint 1: She's a filly.

This is the first time I've used an SCP that was only on the wiki (I think). The actual SCP is closer to two feet than one, but I decided to change it so it fit in the MLP universe. All other facts, except its shape, are accurate.