Korra

Avatar Korra is the main protagonist of The Legend of Korra (sequel series to Avatar: The Last Airbender) and is the immediate successor to Avatar Aang, who died at age 66 from a side-effect of being frozen in an iceberg. By the time The Legend of Korra premiered, Korra has already mastered water, earth, and firebending, and is currently trying to learn airbending from Aang and Katara's youngest son, Tenzin. She, along with Tenzin, Mako, and Bolin, are dealing with an anti-bending revolution from the oppresive Equilists lead by the mysterious masked man called Amon