Princess Yu

Princess Yu is the wife of the Barbarian King. Lu Xing Chen meets her after being captured by the barbarians. He notices the disease spreading throughout her body and internal organs and claims to be able to cure it (which the best doctors from the barbarian land aren't able to). Despite the Barbarian King not willing to listen to him and wishes to just executes him, she convinces him to let Lu Xing Chen try and cure her, which he does.