Genshin Impact: 500 Years and a Single Story

This is a retelling of the Genshin Impact story, with my own twists on it making it different from the original. The largest difference from the original story will be a more mature and darker theme, and because its a complete retelling, even if you have no idea on the Genshin story, you can still read this, so I hope you enjoy.
Here's a quick synopsis:
500 years ago, two twins journeyed across worlds, but one world in particular forced their adventures to a halt.
After one twin was left alone, after Aether was left all alone, he vowed to take revenge on the Unknown God, falling down to the world of Teyvat for a 500 year slumber. With Paimon, an unknown 'thing' by his side, he will journey throughout the 7 regions of Teyvat in search of Lumine, his long lost twin, but whether his journey will end well is simply a pray he has to hope for.