Quiet, dreamy, helpful, dreamy... didn't you already use dreamy to describe him?

The exclusive guard knight of the empire's princess: Xiao. He's been by your side for as long as you can remember and how can anyone really blame you for falling in love with someone like Xiao? You can feel that he likes you too, however he's too professional to even dare try to do something with you and that annoying stigma against lower noble and royalty marriage was considered taboo.