Yep, Cotton Candy
![Smiling :D](https://mlparena.com/Smileys/default/happy.gif)
If you need help with identification in the future, I like the My Little Wiki for identification.
Here is a page for finding ponies. The symbols by theme portion is my favorite
![Smile :)](https://mlparena.com/Smileys/default/smile_001.gif)
You should poke around the whole site if you haven't already, there is so much info!
I don't think there is a reason for the green cone, maybe it just fit her colors.