A promise and oath made to their people shall not be broken.
Five thousand years. Five thousand years since the Divine Guard, the Creator, you, had suddenly disappeared from the face of Teyvat, allowing Celestia to take control while you couldn’t unbeknownst to you.
Though the strange phenomenon of two “falling stars” caused a catalyst to awaken you from your unwilling unconsciousness after so long. Teyvat seemed to thrive more than ever as you returned, creatures and monsters especially knew first. The earth seemed to have more of a resistance against the unnatural ailments of the Leylines and Abyss Order as well.
You were happily surprised when you saw just how much the people of Teyvat evolved over the years, especially when you were not there.