Stock character
The elderly martial arts master is a mentor/teacher stock character in fiction, especially Wuxia, Chanbara, and other martial arts films.[1] Typically an East Asian male, he is a near-invincible master of the martial arts, despite being advanced in age and presumably having a decrease in physical strength. Often he possesses the rank of sensei and is referred to as such by his student. The elderly master most often teaches either generic kung fu or an exotic style specific to the fictional period. During the films, the master often becomes close with his students, with the master becoming a guardian figure to the trainees, who are, in turn, looked upon as the master's children. Usually, when the master is captured or killed, or an iconic portrait of the deceased master has been desecrated by some villains, the students will take it upon themselves to rescue or avenge their master.