Aang

Aang was a male Air Nomad and the Avatar during the century-long conflict known as the Hundred Year War. His immediate predecessor was Avatar Roku, and his immediate successor is Avatar Korra. As the Avatar of his time, he was the only person capable of using all four bending arts: airbending, waterbending, earthbending, and firebending. He was also one of a select few Avatars, and one of the first in many cycles[8] to learn the ancient art of energybending, and the first Avatar known to have actively used the technique. He is an ally of Sonic the Hedgehog and Cloud Strife.