When Wu Mei first entered the palace, she was not called Wu Mei, but Wu Zhao. The name "Mei" was given to her by Emperor Taizong when she was already seventeen years old.
Emperor Gaozong liked to call her Ruyi Niang because her nickname was Ruyi. And after he met her, there were a lot less unsatisfactory things in his life.
When the fourteen-year-old Wu Mei entered the palace, she was not a girl who was inexperienced in the world. Her mother Yang Zixiu taught her since she was a child that "if you want it, just go out and get it."
Good looks and graceful posture are weapons for girls. Wu Mei knows very well, so she never hides these.