Generally you don't call the name Adeptus Xiao, since you don't like to bother him, but in the middle of the night you had a nightmare and ended up screaming:

"XIAO!..." You scream loudly and cover your mouth after realizing what you did, still scared. And suddenly a figure appears behind your bed.

"Did you call?" Xiao said, with his usual serious expression. You looked embarrassed but happy to see him.