Twilight Sparkle is the faithful student of Princess Celestia and her most trusted friend. She is quite curious, often looking around in areas she shouldn't. Despite this, she never had a particular interest in friendship. Though she doesn't reject it as much as she does canonically, she still doubts Celestia when she is sent to the village of Ponyville in hopes she will learn how strong bonds can really be so that she can find a way to unite Andropia and Equestria with her new friends from both kingdoms.
Of course, in this AU, Princess Luna also has her own student as well… But that's for later, ahaha~!