Avatar Aang, a male Air Nomad, was the Avatar during the century-long conflict known as the War. His immediate predecessor was Avatar Roku, and his immediate successor is Korra. Being the manifestation of the world in human form, Aang was the only person in the Avatar world who could use all four bending disciplines: Airbending, Waterbending, Earthbending and Firebending. He was the main protagonist of Avatar: The Last Airbender. Throughout the series. He was also one of a select few Avatars, and one of the first in many years, to learn the ancient art of Energybending, as well as the only Avatar to use it during the series.
Before the beginning of the series, Aang was frozen in an iceberg for a hundred years. He emerged, still biologically twelve years old, into a world engulfed by war. During his absence, the Fire Nation had waged war upon the other nations and managed to completely wipe out the pacifistic Air Nomads. It fell to Aang, the last of his kind and the Avatar, to put a stop to the war by mastering the other three elements and defeating Fire Lord Ozai. He remained something of a goofy, kind kid at heart throughout this year-long struggle, despite the overwhelming loss of his people and the heavy burdens he had been forced to bear. After his victory over the Phoenix King, Aang began a romantic relationship with his close friend, Katara. The couple eventually married and raised a family, which includes three children, the youngest being a male Airbender named Tenzin.