While Princess Celestia knew she had other things she needed to be attending, she could not help herself as she looked at what seemed to be an ordinary mirror.

It was not of course. But only a few knew of the World Mirror at all, and Celestia would like to keep it that way for as long as she could. She well remembered what had happened the last time it had been discovered by one not ready.

Sunset Shimmer had said she had seen herself as a princess, Celestia's equal. But the princess herself had serious doubts her former student had seen anything at all.

Never once in all the years she'd had the mirror had anything like what Sunset reported happened to her. As much as it tore her up inside, Celestia believed Sunset only said so to justify her demands to be made an alicorn.

Celestia had refused of course. Sunset was not ready and her attitude had no business being made a princess and ruler. They had fought, and in the end, Sunset had fled through the mirror.

That had been some years ago now. Every time she thought of it, Celestia wished she had done things differently then. Maybe if she had, Sunset would not have run away.

"Are you sure of this sister?" Luna asked as she entered the room with Celestia. She too knew of the mirror, though her own experiences with it had not lead to anything.

Celestia nodded. "I had always intended to show this to Twilight. In hopes of her maybe discovering more about it and how it works. Or maybe bringing Sunset home."

Luna doubted the last could ever happen. From what she did know of that situation, she did not think miss. Shimmer would have changed at all during her time away.

She had not, and she had been gone for far longer than her sister's wayward student. "Does Novo know we are bringing it with us?"

Celestia nodded. "I told her this morning we are bringing it. She knows what it does and my story with Sunset. She has no problem with showing it to Twilight."

Luna walked up beside the elder alicorn and looked at the mirror. "Then what are you afraid of? Even if Twilight remembers nothing, I cannot see her not passing up the chance to study it."

Celestia smiled at that. "I know Luna. I am not afraid of that. I fear what will happen when she and Sunset meet. The mirror opens tonight. And I too doubt Sunset has changed for the better, no matter how much I wish for the better."

Luna rolled her eyes. "I very much doubt miss. Shimmer is a match for Novo, let alone Twilight and Skystar. Or all three together. If that is not what worries you, then what is?"

Celestia's head bowed. "I fear what will happen if Sunset flees back through the mirror and Twilight goes after her. Very little is known of the other world on the other side. Even I know little of it."

"You think she would not be able to make friends?" Luna asked.

Celestia shook her head. "Twilight has a natural ability to make friends, no matter what. Her time in Ponyville proved that. It is what Sunset might do to provoke her going after her that I worry about."

Luna didn't understand what her sister meant by that. "What do you mean?"

Celestia looked at the Element of Magic sitting on a nearby table. "Sunset has always had an appetite for power and ways of getting it no matter what. I fear she will go after the Element of Magic."

Luna shook her head. "It would not respond to her. We both know that."

Celestia nodded. "Indeed. But it could have other effects on her. That is what I worry about. And if by some chance she does manage to steal it and get back to the other world, what will its presence do to that world?"

Luna couldn't argue with that. It was true to be sure. Neither of them knew what effect magic would have on that world if it was brought into it. Magic did not exist there from what they knew.

For both world's sakes then, Luna thought, she hoped the worst did not happen, and the most that would happen would be the mirror opened for three days before closing again.

There was little time to think about it more though as their airship departed Canterlot in a few hours. Twilight Velvet and Night Light were already on their way to the castle, and Cadance and Shining were due any moment from the Crystal Empire.

All that remained was to wait for Twilight's Ponyville friends and Spike to arrive. Their train was due any time now.

Author's Note

So, this will have a major impact on the story going forward. Equestria Girls 1 will happen as we know it from the film. At least from Twilight's arrival at Canterlot High forward.

There will be changes for sure. Because Twilight has no memory of her Ponyville friends, her efforts to befriend the Humane 5 will be more sincere and not just because of Sunset's meddling.

Twilight doesn't know how to judge them compared to their pony counterparts, and they don't know her at all. It's the perfect chance to start friendships anew with no strings attached.

Or at least that's what I'm going for.