As for how far a person can control his appearance, just look at Meng Ruxing. As the daughter of a princess and a queen, she was willing to marry a eunuch (the kind with all the power over the government) because of a quarrel with the emperor and the president of the Appearance Association. But what she didn't expect was that she and him had an inexplicable relationship.
Purpose: You are my Renaissance, take me out of the darkness and bring me new faith and salvation.