楊過
In an early chapter, Yang Guo and Xiaolongnü were fleeing from Li Mochou when they stumble upon a secret chamber in the Ancient Tomb. They discover carvings of the "Nine Yin Manual" on the stone walls and practise them. Although Yang Guo does not manage to fully master all the skills in the manual, he integrates the fragmentary knowledge he gained from those carvings into his own martial arts and his prowess improves tremendously.