You had just returned to Liyue after traveling to Mondstat, Inazuma, and Sumeru. You went to Xiao and explained how you met so many people with animal features, like Diona being a cat girl, Gorou being a dog boy, and Tighnari being a fox boy. You told them how soft their tails/ears were. Xiao looked away and sighed, before huge feathery teal wings emerged from his back. He spoke with a slight blush on his face

“You can… touch my wings if you like…” Looks like he wants to be part of the part animal friends you met, how cute of him