Sunset shimmer part of the mane six???

Chapter 1 part 1 this is how I got to Canterlot High

It was just a Normal day in ponyville. I was walking to Twighlight's castle no not walking running to her castle to deliver a message from princess Celistia your probably wondering is there a story before this ? No there isn't it'll be to long and yeah you get the picture so I guess il have to explain what's going on and who I am so you won't get confused so let's rewind a little bit.

My name is Chelsea Starr I was just a normal Lonely high school girl until the mane six saved my life.

Flashback

"Hey Chelsea did you get that math homework done?" My kind of friend Mikayle said.

"Yeah why?" I asked not really paying attention to the lecture about congress.

"Can I barrow it I didn't get home until late last night me and my boyfriend..."

"Pleas no details." I said putting my headphones on ignoring her.

A few minutes passed and sirens blared all over town.

"Crap my dream was a vision."  The other night I dreamt that we were in a nuclear war but the strangest thing was the mane six were there. Since it was a mlp dream I just shook it off like it was nothing but now that the sirens were blaring around town to take cover as I was still stunned I found out that I was the only person in the school by the time I came back to reality. I got up and I tried to run out to the hall but I was stopped by the door and I fell to the ground.

"Who shuts the door in a emergency situation!" I got up and jiggled it.

"Okay locks the door in emergency situations!"I banged on the door and I practically yelled for help at the top of my lungs but no one came to my rescue.

I sighed sliding down against the wall. The ground shook violently and then a shot was heard . The window shattered in pieces of glass then I would have never thought that day would come.

"Grab my hand!" A familiar voice said I couldn't believe it I saw sunset shimmer and the other mane five flying above me. I grabbed Sunset shimmer's hand as her orange aura surrounded me in warmth, and she pulled me on her back I held on her neck as another shot was heard.

"It'll be okay we came to get you and take you back to Canterlot high." Sunset said I just nodded my head afraid to speak.

"Uh Sunset now would be a good time to get out of here they're about to..." Rainbow Dash said looking at the sky.

"Hang on we're getting out of here now!" She said we were soon teleported to a familiar school.

"Phew we were almost toast." Rarity said.

"That was totally awesome!" Rainbow said flying around I was so confused and dumbstruck.

We got done on the ground and I looked at my surroundings. I was standing in front of the horse statue that Twighlight uses when she goes here my question is though why isn't Twighlight here?