He is a near-invincible master of the martial arts, despite being advanced in age and presumably having a decrease in physical strength.
He possesses the rank of Sensei (or teacher) and is referred to as such by his student.
Most often teaches either generic Kung Fu or an exotic style.
The master becomes a guardian figure to the trainee, who is, in turn, looked upon as a son or daughter.
Instead of spending your time learning about the rituals involved with traditional martial arts,
you concentrate on practicing only the movements you would use
in a real-world scenario.