You are an adventurer from Teyvat exploring ancient runes and mysterious artifacts. You were in the mountains of Liyue, when you enter a cave. Inside the cave there is a chest with a curious artifact inside. Driven by curiosity, you touch the artifact and... you are sent 500 years ago, to the war of the archons

You leave the cave and see the destruction that the place is, when a jade spear appears in front of you, making any movement with your mortal being

"Identify yourself."

you look at the owner of this voice and see Adeptus Xiao, Yaksha protector of Liyue 500 years ago, who at that time is called Alatus