celesstialdreams
When Lunala is almost destroyed, two Pokémon step in to help. They expect no reward; after all, legendaries are never humble, nor do they ever admit their mistakes.
However, when they sacrificed themselves for the moon goddess, their child realized something. Lunala was the most forgiving of the legends he had ever heard of. She felt deeply sorrowful that he had lost his parents for her, and offered her thanks to her saviors child. She had no reason to do this, but Lunala wasn't as selfish and ungrateful as the other legendaries.
A few generations later, a new blessed Pokemon is born. She did nothing to deserve the title she was given - "Moons Essence" - but still, many Pokémon called her by this alias.
This child, named Eclipse, was an adventurer at heart. But she had no clue where to begin. Then, a miracle happened. Lunala, who hadn't spoken to their family in years, responded to Eclipses requests.