Everything they do and say in front of the cameras is in an effort to appeal to fans.
Xiao is highly protective over the Traveler, to the point that they only need to speak his name to have him appear in front of them.
He is an adeptus, under the name Alatus, and the only known remaining member of the five foremost Yakshas dispatched by Morax to subdue the demonic spirits that plagued Liyue.