Everyone knows Sugarcoat as being a stuck-up, smart-mouthing, hyper-intelligent, soon-to-be valedictorian with grades who surpassed everyone at Crystal Prep after Twilight left for Canterlot High.
But, much like everyone, Sugarcoat had a childhood. And when she tells her story to the other Crystal Preppers she finds to be her acquanitances, they'll find out that she was much, MUCH different as a kid.