Aang

Aang is the main hero in the cartoon series Avatar: The Last Airbender.

Origin
Aang was a mischievous youth from the Air Temples. Amazingly, he mastered air-bending at a very young age; a sign that he was, indeed, the avatar. When the monks of the Air Temples reveal to Aang that he is the avatar, Aang reacts in a confused manner. Believing that Monk Gyatso, Aang's personal mentor and father-figure, would hinder Aang's training, they decided to send Aang away to the Eastern Air Temple to receive proper training. Aang refuses to accept his destiny as the avatar, believing it will tear him away from Monk Gyatso, and runs away with his sky bison, Appa. However, he is caught up in a terrible storm, and gets knocked deep underwater with his bison. Unconsciously entering the avatar state, he water-bends, freezing Appa, and himself, to save them from drowning. One-hundred years later, he is discovered by two Water Tribe residents, Katara, and Sokka. Together, these three set out to save the world from the oppression of the Fire Nation.

Powers and Abilities
Being the avatar, Aang naturally has the ability to bend all four elements: air, water, earth, and fire. However, he will have to awaken each power through the teachings of specializes mentors.