In the Rainbow Factory...

Rainbow Dash landed in front of the Rainbow Factory and scanned her hoofprint. She let the door open as soon as the scanner recognized her hoofprint and she stormed in.

"Ms. Dash! Are you alright?"
Hide Atmosphere flew over to Rainbow Dash.

"My so called friend just betrayed me. And you know I don't take betrayal well."
She left out the s, not wanting to cause any problems.

"Hm? Well, what do you plan on doing with her?"
"Well, I can't kill her. That would throw the harmony off balance. It's already slightly out of balance."
Kill them. And you won't have to feel the betrayal ever again.
No. Equestria might be taken over by chaos again and the Princess might not be able to do anything.

"Er, Miss Dash? Are you okay? You kinda zoned out for a sec."
"Uh- yes. Please excuse me."
Rainbow Dash walked away. Atmosphere cocked his head to the side.

"Ah. So you're going to act like that, eh? You'll going to be fine soon."
A fire colored mare flew over.
"Dr. Atmosphere, sir. You're needed at one of the backup devices."
Atmosphere sighed and lifted his glasses up a bit.

"What's wrong with her now?"
"I- she won't work. I think one of the gears got jammed again. Thankfully, nopony turned her up to full gear when it happened."
"That old thing might have to be repaired or even replaced soon."
"But sir, she's been here since we started this rainbow making process. We can't replace her now!"
"Phoenix. Please calm down. We'll find someway to make her stop doing that. That old hag is one of the factory's greatest reputations."

"What am I going to do?" Rainbow Dash said, slamming a hoof on her desk, the other one on her forehead.

"I can't move now! Nopony would survive a day in my horseshoes. Probably except Atmosphere. But I can't."
Rainbow Dash looked at the picture of her 'friends' on her desk. It was the day after the gala. She removed her hoof from her forehead and slammed the picture down, cracking the glass. It hurt to see it. She didn't want to be reminded of the incident once she forgot it.

Just kill them.
How many times must I say no?
Just kill them. And the pain will go away.
NO.
They'll come and get you back soon. And they'll be dead the second they enter.
Shut up.
Somepony knocked on the door. Rainbow Dash sighed.

"Who is it?"
"Ms. Dash. Your... er... 'friends' are here to talk to you. They're waiting outside."
"Glaze. Please. I told you I want nothing, and I mean NOTHING, to do with them."
"They said it was important."
"Tell them nothing is going to change my mind."
"But-"
"DO NOT make up excuses."
Rainbow Dash heard Glaze's hoofsteps fade away as she walked away.

"Now they'll just keep bugging me until they get me back." Rainbow Dash groaned.

As I said, just kill them and they'll stop bugging you.
The more you mention it, the better the idea sounds. But it'll just throw the harmony off balance untill the princesses gain control of the elements again. Which means I'll have to die too.
No one gives a shit about harmony in here, right?
Well, I do.
...

Rainbow Dash heard a commotion outside. She got out of her chair and opened the door. She flew towards the racket and growled when she saw what the commotion was about.

"Rainbow Dash!" Twilight shouted as Applejack attempted to buck a guard in the face. Twilight flapped her wings at the guards, making it more difficult for them to reach her. Unicorn and alicorn magic was prohibited inside the factory. Rainbow shook her head and sighed.

"Let go of them. ALL FIVE OF YOU. OUT. SIDE. NOW."
The guards let go of the five ponies and they all glared at them. The five mares went outside. Rainbow Dash angrily landed on the cloud floor outside. Twilight tried to burst out an apology.

"Rainbow Dash! Please! Just give us ano-"
"NO. I want nothing to do with you guys. I hate you all. And I NEVER want to see you guys EVER. AGAIN."
"Please! Rainbow! We-"
"MUST I call the main weather factory ponies here?!"
"But I thought this was the-"
"This is the Rainbow Factory. The Weather Factory is RIGHT THERE. NOW GO AWAY."
"Come on, Twi. There's no changing her mind."
"B-but the Elements! Equestria! The ponies! They need all six of us! The Elements won't work without all six of us!"
"So? Like I give a crap about-"
Rainbow Dash cut herself off.

"Just go away. If I ever see you guys again, don't you dare try and get me back again."
All five ponies looked at each other and nodded.

"Okay. But I hope you'll change your mind."
"Oh, I promise you all I won't."
She began walking back inside. Twilight sighed.

"Sorry."
Rainbow stopped walking.

"It's too late for sorry's now."