Avatar Akko

Akko is a witch, but also the Avatar. She can only firebend and earthbend, while Aang can only waterbend and earthbend. Akko also has a secret bending called genetic bending. During the hundred years Aang was in the iceberg, Akko was stuck in the spirit world. Now, Aang, Katara and Sokka go to the earth kingdom to search for the second Avatar.