Tai Lung is the main and sole antagonist of Kung Fu Panda. He was the adoptive son and former student of Master Shifu, and a powerful master of the Leopard Style of kung fu.

Trained by Shifu at the Jade Palace, Tai Lung was raised under the impression that he was to become the prophesied Dragon Warrior. However, after he was denied the title by Master Oogway, Tai Lung revealed his true dark nature by ravaging the Valley, resulting in his incarceration for twenty years. After breaking out of prison, he sought to claim the Dragon Scroll and take his place as the Dragon Warrior once again, fighting and defeating many warriors in his pursuit. However, despite being a warrior of great strength and determination, Tai Lung finally met his match when he was defeated by Po, the true Dragon Warrior.
Personality
Tai Lung is best described as a warrior whose pride and ambition led him down a dark path. As a young cub, he showed promise in the art of Kung Fu and had a close bond with his master, Shifu who in his eyes was his true father. However, as he grew older and more skilled, he became overconfident and egotistical, until he believed that it was his destiny to receive the Dragon Scroll and become the Dragon Warrior.

However, when approached by Oogway, the old turtle saw darkness in his heart and did not see him as worthy enough to be the Dragon Warrior. After his master and adopted father, Shifu said and did nothing after hearing this, Tai Lung considered this an act of a betrayal and his pride was replaced with rage. Tai Lung went on the warpath across the Valley of Peace, laying waste to everything in his path and decided to take the Dragon Scroll by force. He hates Shifu and even violently attacks his old master when he was in his way. Eventually, Tai Lung was subdued by Oogway and sentenced to Chorh-Gom prison.

However, 20 years in jail did not soothe his hatred and anger. Instead, he became even more determined that he was the Dragon Warrior, even telling to Zeng that he was "the real Dragon Warrior" and he was returning to the Valley of Peace. Tai Lung retains his arrogance and brutality; he could not believe for one second that Po, who was an overweight panda, could be the Dragon Warrior which ironically was a factor in his defeat (granted he was able to defeat the entire Furious Five himself so maybe his arrogance was justified).

Despite his ruthless and hard exterior, Tai Lung is also naturally insecure, so he did not believe in himself to begin with and needed the Dragon Scroll to believe so. While dueling with Shifu at the Jade Palace, he actually screams to his father that all he ever did was only to make him proud, indicating that despite nearly two decades of alienation between the two Tai Lung still wants his old master's approval. Even after hearing Shifu's confession that he had always been proud of him and that his pride blinded him into seeing what he became and made an apology for it, Tai Lung finally saw that Shifu still loved him, but he hardened his heart as he still wanted the Dragon Scroll.
Origins
“ Shifu found him as a cub and he raised him as his son. And when the boy showed talent in kung fu, Shifu trained him. he believed in him. He told him was destined for greatness. It was never enough for Tai Lung. He wanted the dragon scroll but Oogway saw darkness in his heart and refused. Outraged, Tai Lung layed wasted to the valley. He tried to take the scroll by force and Shifu had to destroy what he had created. But how could he?