Mr. Miyagi
In The Karate Kid Part III, Daniel wants to fight in the karate tournament to get money but Mr. Miyagi tells him not to do that because he doesn’t believe in fighting for glory. So Daniel asks Terry Silver to train him and keeps that a secret from Mr. Miyagi. Then Daniel realizes that he’s broken Miyagi’s rules about only fighting for defence and never revenge and apologizes to Mr. Miyagi and Mr. Miyagi forgives him and saves him from John Kreese.