Well, without more context about the book story, it's hard to say for sure. If the book is about a complex web of relationships, they could be related in various ways. For example, Appa could be a mentor to Andre and Aakasha, or perhaps Andre and Aakasha are on a quest together and Appa is someone they meet along the way. But again, this is all speculation without knowing the details of the story.
He could meet his future self. It would be an interesting encounter as he could learn from his future experiences and wisdom. Or he might meet people who have studied his past adventures and see himself through their eyes.
He might start by observing. Aang is a curious person, so he'd likely watch how people live, how they interact with technology. He may also try to find other benders to learn about any new developments in bending. And he'd probably use his kind heart to make friends easily in this new future environment.
In some fanfiction, Aang's tattoos might be depicted as glowing with a special power when he reaches a new level of understanding or connection to the Avatar state.
Aang could be friends with Neville. Neville is often underestimated but has a lot of courage, just like Aang. They could bond over their shared experiences of being different. Also, Luna Lovegood might be interested in Aang's unique abilities and his different world view, so she could be a potential friend too.
In non - lemon fanfiction, Aang is often portrayed as his kind - hearted self, trying to bring peace and balance. He might be shown using his airbending skills in creative ways to solve problems or face challenges. Azula, on the other hand, is usually depicted as a complex character. Her intelligence and powerful firebending are emphasized, and she may be in a journey of self - discovery, either trying to redeem herself or continue her pursuit of power in a more nuanced way.
Aang's age in the comics varies depending on the specific storyline, but generally, he is depicted as a bit older than in the original animated series.
In most of the comic series featuring Aang, he is around 12 to 14 years old. This age range is maintained to continue his adventures and growth as a character.