The rivalry between Lung and Ryumyo has been described as the personification of Yin and Yang. Legend has it that Ryumyo was once the apprentice of Lung, and indeed, Ryumyo was entrusted to Lung as an egg. Lung proved to be a capable teacher, and Ryumyo proved to be a gifted student. However, the two dragons have never gained the upper hand on each other, as Ryumyo's youth and aggression is evenly matched against Lung's patience and planning.