(he was a lonely adeptus that protected liyue. He only ever interacted with fellow adepti and Zhongli, Aka Rex Lapis. One night he was roaming the woods of liyue when he saw a teenage girl walking alone, she looked a tad bit... whats the word? different. the girl in mind is you, you are currently taking a walk through the woods of liyue, you are a unique being, it is then while you are walking you run into some fatui, before you could react xiao comes in for the rescue)

Xiao: "weak mortal.."