Acceptance

Luna raised the moon, then noticed Gemanei wasn't in the right spot. She moved it over about 1500 lightyears to the left. Then came the third of her nightly duties: dreamwalking.

She cast the spell for the millionth time. Although Luna was bored, it was her duty, and she stepped into the portal, coming out on the starry road. She was just about to step into Apple Bloom's dream when she missed, lost her balance, and fell over the edge. Nopony knew what was below, because only a few had managed to cast it: her, Celestia, and Starswirled the Bearded, and none of them wanted to know.

Luna fell sideways, because that was the only way to fall off, and she was spinning. She almost threw up on whatever was below. She slowed her spinning by opening her wings, seeing that she wasn't falling forever and fell into... another starry road? It wobbled slightly upon impact, but otherwise, it was stable.

It wasn't the same, probably. After all, nopony had ever been there. She checked her body; nothing broken, just a few scrapes.

There were sobbing noises coming from one of the portals, and, curious, Luna walked through. A young creature was in a dark dreamscape, crying and alone. It had four legs, like ponies, but the front ones had five longer appendages sticking out, and the rear ones were longer and had five short, stubby appendages each. Each one of these appendages had a strange hard thing that looked as if pressed into its skin. It wore clothes, possibly hiding its tail, and its muzzle and brown eyes were tiny. Its ears looked strange and were on the side of its head.

It... looked exactly like the thing Twilight Sparkle had described a year ago, except it didn't look like any of her subjects, who she had gone all over Equestria to meet, seeing as she hadn't been there for a thousand years and needed to have her subjects feel comfortable around her. So she approached it, and it gasped.

"Luna?" Apparently it was female. "I'm dreaming, right?"

"I'm real. I promise," said Luna.

"But if you're not, it's not a real promise."

"Never mind. Why were you crying?"

"I hate my life. Can I come with you to Equestria?"

"How do you know my name and where I'm from?!"

"Ahh, can't tell you."

"Why not?"

"It would break the fourth wall."

"The what now?"

"Then again, you already know I exist, and Pinkie basically destroyed it."

"Whaat? How...?"

"You're on TV!"

"I'm on what?"

"It's a communication system used by us humans."

"Then how do you know we exist?"

"Because... um... Lyra! Lyra Faust!"

"Whaaaaaat?"

"Never mind. Aaaanyway, can you help me?"

"How...?"

"I told you, take me to Equestria."

"Are you sure?"

"Absolutely."

"Hold on," Luna reopened the portal to the star paths. The filly human didn't move. "I mean literally."

"Oh!" the human said, climbing on gently.

Luna, seeing that the filly human had been sleeping the entire time, lay her down in a random field and flew back to Canterlot to continue her nightly duties,  but flew slightly south to tell Twilight Sparkle about what just happened. Surely she'd be interested.