insideout91:
I wish I can find any movie or drama with character similar to XL
Princess Agents is far from a perfect drama and Yuwen Yue is not exactly like XL...
But... the first meeting between YY and the FL (who seemingly has a lowly status and goes by Xiao Liu, but who has a birth secret that is tied to a mystical flower symbol on her body) involves an attempt to poison YY and punishment for the FL. They have a combative start with a power imbalance. However, their similarities create a sense of mutual understanding, interest, respect and camaraderie, plus chemistry. Later on, due to conflicting loyalties, he and the FL are enemies. And yet there are numerous occasions where, when she is in danger, YY arrives to protect her and risks his life for her. He often wears white and usually has a stoic demeanor, but his actions clearly convey his feelings for the FL.
YY is very loyal to his adoptive grandfather.
You could also say that he is associated with the moon. Yǔwén Yuè = 宇文玥. The 玥 / Yuè in his name refers to a mythical sacrifical pearl. It combines the characters 王 (king/emperor) and 月 / Yuè (moon) and it has the same pronunciation as 月 / Yuè (moon). YY's preferred nickname for the FL is 星 /
Xīng (star) and one of the tracks on the OST is called 星月 (star moon).
And then there's his ending... the last battle, fighting against impossible odds... fighting to the last man... numerous wounds staining his white robes red... his last thought was that the FL should stay alive and his last act was to push her away...