One of the powerful and enlightened Adeptus who guard Liyue. She is also called the "Yaksha Guardian". Despite having a young appearance, some of her feats already appear in ancient books from thousands of years ago. Xiao is shown to be quite polite, reserved and logical, though brief and to the point. as she is shown to remain calm and reconsider her actions. She is rarely in a good mood and prefers to be alone.Xiao is also revealed to be a strict but effective teacher.