Jinora

 Jinora is the first child and eldest daughter of Tenzin and Pema and granddaughter of Katara and the late Avatar Aang. She lives on Air Temple Island with her parents and three younger siblings: Ikki, Meelo, and Rohan. Possessed of an avid interest in books and quiet in general, Jinora is the youngest known airbending master and has a natural affinity with spirits; prior to the reopening of the spirit portals, she was one of only a handful of humans who could communicate with and perceive spirits in the physical world.