1884. Master Shifu

Master Shifu is the deuteragonist of the first film, and an important character in the second. Shifu is the student of Oogway and trainer of the Furious Five, as well as Tai Lung. Shifu once loved Tai Lung like a son after he was abandoned at his doorstep as a very young cub. He tried to subdue him after Tai Lung attacked the Valley and made a bid to take the Dragon Scroll by force, but froze, unable to destroy what he created through love, and failed. In Secrets of the Furious Five, it is revealed that he is Tigress' adoptive father as well. He taught her how to control her own fury by playing a game of dominoes with her and later adopted her as his own daughter from an orphanage despite all the other adults' fear of adopting her. His experience with Tai Lung otherwise stiffened him, unfortunately, causing him to train Tigress and the Furious Five in a harsher and more critical manner than he used with Tai Lung.
He is at first unwilling to train Po, not believing he has what it takes to defeat Tai Lung; he therefore tries to make the training unbearable to force Po to give up. As such, Shifu is greatly annoyed at how Po embraces and endures all his attempts. Shifu also voices his contempt of Po by referring to him as "Panda" rather than his name. After much convincing from Oogway as well as his new responsibility as the guardian of the Valley of Peace after Oogway's ascension into the Heavens, Shifu agrees to seriously train Po until he is ready to face Tai Lung.
This proves much more a challenge than he anticipated when Po, in addition to his apparent physical limitations, confesses a deep self-loathing that the monk felt powerless to counter. However, when Shifu discovers Po's considerable latent strengths when motivated by food, the monk fashions a personal training regime that enables the panda to quickly become a formidable warrior. Po's throwing back the dumpling they fought over in Po's final test is an even more encouraging sign that his student has improved his strength of spirit as well, an essential element of a warrior.