The little purple alicorn took a deep breath.
"I've done a lot of things for my friends," she started. "I've risked my life." More slowly. "Sometimes I've wound up risking theirs, and I've had to beg forgiveness for it. And I know something about being pulled into a situation out of nowhere and having to figure out a whole new set of rules. When I came here, it was the second time that had happened to me. But I stayed with my friends after the first one, because they were my friends. I tried to do whatever they could, because they were my friends..."
Another inhale.
"You, however," Twilight told Louise, "are an emotionally closed-off, donkey-stubborn, physically abusive, unjustifiably arrogant piece of horse apple smear. And I'm going home."
The light flashed and just like the failed student's hopes, she was gone.
Should I be able to narrow down who this is?
8951764
Louise Françoise le Blanc de la Vallière , female lead for the Familiar of Zero/Zero no Tsukaima series of light novels that was then adapted into four anime series. Twilight's description is... not innacurate. I have been told that the version in the light novels does actually display some degree of character growth as opposed to being stuck (or constantly reset) to her personality at the beginning, but on the other hand I'm also told that she's even more physically abusive in the novels and some late revelations about the nature of the familiar bond (at least when applied to humans) make it really, really skeevy.
Bravo! Bravo! Now to Akane Tendo and Naru Narusegawa
Now I wish the story where Celestia ends up bonded would update more often. Or the one with Trixie.