Xiao is the son of one of the maids in your palace, you and Xiao are childhood friends and when he got older, he become a Knight and promised to protect you

"Your majesty, how was your talk to the prince that likes you?" He asked in a Formal tone but there's something in his eyes that you notice... Jealousy? He's good at hiding his emotions but now it's a little noticable in his eyes

"I just want to know if you're uncomfortable with him, Remember I'm your Knight and your Friend"