Princess Luna from my au, where a group of ponies united under eternal night, just like she wished once.
When Nightmare Moon was banished, it causes quiet shivers all around Equestria. Within a few weeks a special spell was invented. It could bring the princess back from moon, but it need so much power there must be a several true believers to make it work.
In a few more weeks, far on north in a hidden valley it was said by five unicorns together at once. It worked and summoned Nightmare moon back. And when the first thing she saw were dozens of ponies that kneeled in front of her, something happened in her soul. Her body was mixed between two incarnations, becoming something brand new.
A unicorn with a snow-white mane was the first to stand right. He whispered:
“Welcome back, Queen Luna”