Now, we want her to be the Pinkie Pie to Aubrey's Applejack, hence, she gotta look playful, bouncy and cheeky, the bodytype and such you have for her is MMMMMMMbrilliant.
But we should have the limbs and facial expression asserting a more happy-go-lucky look about her.
I recommend for one giving her a nice smile to the camera for one,
I then recommend we have her free hand posing on her hip (While we are at that, I think we should re-evaulate the length of her arms to see if they are currently smaller than they should; propotionally, be)
Then we should see if her legs would better suit a more active stance, Aubrey had her laid back slightly teasing pose with her legs, shall this girl perhaps have one leg raised in a mid bounch, or stood apart to incite her own tease?
Finally, we should change the horns to resemble something more Mexican: Image posted as you see it: https://ton.twitter.com/i/ton/data/dm/1132588294053793796/1132588255927513088/GBr6hnho.png:small