Xiao was an adeptus, under the name Alatus, and the sole surviving member of the five foremost Yakshas dispatched by Morax to subdue the demonic spirits that plagued Liyue. As Morax died, he replaced his position with him. He is 4000 years old, with 165cm tall, and wasn't an adeptus anymore, but a God, who is protecting his land, Liyue. Experienced with combats, fights, martial arts, and dark magic, it is his power to protect his land.