        Take Twilight Sparkle.  As her mentor, Celestia felt it was her duty to personally correspond with the unicorn—especially since she was being carefully groomed.  Fortunately, the unicorn was almost completely oblivious to Celestia’s grand plan—strangely, for all her curiosity, she had never once wondered why her personal foal-sitter was a princess.  Moreover, it had never occurred to her that Celestia could easily have gotten the dragon to move on, nor had she wondered how it was even conceivable that Celestia didn’t know what parasprites were.