Zuko is another important character. His redemption arc is well - known from the main series, and the short stories might continue to show his development as he tries to make amends and rule the Fire Nation in a more positive way.
Katara and Sokka are also main characters. Katara is a powerful waterbender and Sokka is the strategic thinker. Their roles in different situations and how they contribute to the overall story would be in these short stories.
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.
Aang is a main character. He's the last airbender and the Avatar, who has to master all four elements to bring balance to the world. Katara, a waterbender from the Southern Water Tribe, is another important character. She helps Aang on his journey. And Zuko, the banished prince of the Fire Nation, is also a key figure as his story of redemption is a major part of the plot.
Aang is still a central character. He's the Avatar and has to keep the balance in the world. His journey of mastering all four elements continues in the graphic novels.
Aang is one of the main characters. He's the Avatar. Katara and Sokka are also important. There's Zuko too.
It's hard to say for sure without reading it, but likely Aang would still be a main character. He might be older and facing new challenges. Katara could also be a main character, perhaps with her waterbending skills being even more refined. Zuko too, as he continues to deal with the Fire Nation's future.
There are several important characters. Aang is the central figure. He's the one who has to bring balance. Katara is crucial as she's not only a waterbender but also a great friend and support to Aang. Sokka may not be a bender, but his intelligence and skills are valuable. Prince Zuko has a complex character arc. He starts as an antagonist trying to capture Aang for his own redemption in the eyes of his father, but later he changes. Also, Toph, the earthbender, is an important addition later in the story as she helps Aang with his earthbending training.
Zuko is extremely popular as well. His complex character arc, from being a villain - like figure to a hero, is very engaging. People love to see his transformation and how he overcomes his inner demons and the expectations of his family and nation.
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.
The main characters are likely to include Aang, who will be at the center of any attempts to keep the peace. Zuko, who has the huge task of reforming the Fire Nation. Katara, who could use her waterbending and her wisdom to heal the wounds of the war, both physically and emotionally. Then there's Sokka, whose intelligence and creativity will be needed to solve the various problems that arise in the post - war world. Also, Appa and Momo will probably be around, adding a bit of their own charm to the story as Aang's loyal companions in this new phase of their lives.
Toph would be an important character. Her earth - bending skills and no - nonsense attitude would be valuable in the post - war world. She could help with rebuilding efforts, especially in the Earth Kingdom. Sokka, with his strategic mind, would be another likely main character. He could be involved in diplomatic negotiations and helping to plan for the future security of the nations. And of course, there could be new characters introduced who are the children or students of the original heroes, bringing in a new generation's perspective.