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I don’t have names for them.

I decided to pair her with Thunderlane for this because I thought a rainbow mane with a black coat would look cool.
The oldest has a pretty chill personality. She loves to fly through clouds and watch sunsets. She’s cheerful and loves to have fun. Her cutie mark is a heart shaped cloud.

The other two are twins. The girl with the blue coat is older by a bit. I gave her the color scheme of Rainbow Dash Destroyer of Pies, because I thought it would be funny and it looks cool. Her cutie mark is a flying cloud and rainbow lightning bolt.
She has sort of an extreme personality, she likes to go fast and is a bit of a dare devil. She wants to be as cool as her mom. She wants to be able to do a sonic rainboom but is frustrated because she hasn’t been able to.
The youngest acts a lot like his twin sister, and most ponies think they have the same personality, but he mostly just tries to be like her because he looks up to her and she is his best friend. He likes to spend time relaxing and reading. He enjoys racing for fun but doesn’t really care if he wins or not. His cutie mark is a rainbow tornado.
The twins find out later that they can make a sonic rainboom if they fly fast together.

heresy

Pie Hater Dash is maybe adopted child. At least she should look like teen Applejack then.

@HorsesandMuchMOAR  
Sure. Why not?

New CMC:  
Scootaloo- Filly Evil pie hater Dash  
Sweetie Belle- Silver Rain  
Applebloom- Thunder Cloud

@Sweet Blast
 
Can I hug her?
 

Pie Hater! How many times I told ya about using ,,younger spell”? You are now a sweet,little filly!

The dark blue filly to Thunderlane’s left looks very much like a cuter version of Pie Hater Dash.
 

A modern pone age family