In the 'Avatar The Last Airbender Avatar Kyoshi Novel', Kyoshi is the central character. She is the one with the Avatar powers and the one on a journey of growth. Then there's Yun. He is a character who has his own story arc that intersects with Kyoshi's in interesting ways. And Hei - Ran, an important figure in Kyoshi's life, who imparts wisdom and training to her.
Katara is another important character. She is a waterbender from the Southern Water Tribe. She is brave and often serves as a moral compass for the group. She also helps Aang in his waterbending training.
Avatar: The Last Airbender is indeed an original story. It has its own distinct style and narrative that sets it apart. The combination of elements like bending powers, diverse characters, and complex story arcs make it a one-of-a-kind creation.
Definitely not real. It's a fantasy world crafted with unique characters and magical elements that exist only in the realm of imagination and storytelling.