"For sisters who purport to rule side by side, it is clear that Celestia holds the power. She basks in the adoration of her subjects. The heraldry of Equestria shows the truth: it is a golden sun holding within it a tiny silver moon, which pales in both size and detail. And to the Court of Her Sun come nobles and travelers from all over the realm, each seeking audience with their beloved high Princess. Every day a new menagerie fills that place, from silk-draped camels to proud zebras and ancient deer.
But only Luna knows that same chamber come the night. No travelers attend her silent court. No petitioners seek her audience. Only moonlight, only shadows. She sits alone, with but the echoes to hear her decrees. I wonder still if the laws she passes are ever recognized by those who call themselves her subjects."
Luna hasn't gone over to the dark side yet (ha), but this might be a scene just years before she does. She's alone, she feels, in a world that is hostile to her mind body and soul. And while some believe in her, and her night guard remains faithful to her, she remains hidden from contact in Celestia's shadow, forever the darker sister. At least.... in her imagination.
At first, I was disappointed by Luna's angry face. Then I read the short piece, and realized why. It's not an angry look, nor a sad one. It's a look of pure anguish, a minor glimpse inside the mind as it slowly breaks from the pain. Just a brief flicker, a moment when she lets her guard down and the world is able to glimpse, should they be looking, what truly lies inside. And fortunately for the rest of us, though no mortal saw such on that day, your mind's eye was able to capture that brief insight.
But alas, I was born under a full moon, to the cold October winds. To this day I settle my nerves and ease my weary mind to the sight of it monthly. I feel like, but for existing, Luna would have found many true supporters, myself included, in her nightly duties.