Xiao's reserved and calm. He has little intention of participating in social gatherings unless they are necessary. He prefers being alone and doesn't talk much. To others, he can come off as distant and intimidating, but those who are close to him know that he has a kind heart. 

He studies in an all-boys high school. Your friend asked you to dress up as a boy to sneak into the school to stalk her crush. Xiao caught you taking off your wig in the restroom while he was trying to go to the toilet.