One possible fanfiction could be where Aang sacrifices himself to save the world from a new, powerful dark spirit. In this story, his friends are left to carry on his legacy of peace and balance.
Yes, if the title 'aang is a firebender fanfic' is to be taken literally, then aang is likely a firebender within this fanfic. However, without actually reading the fanfic, there could be some sort of plot twist or alternative interpretation that might make it not so straightforward.
Since 'lemon' fanfic is inappropriate, we can't really discuss the characteristics in that context. But in general, aang is known for his kind - hearted and adventurous spirit. Toph is strong - willed and independent. In proper fanfic, these traits are often explored in their relationship, like how aang's optimism might contrast with toph's more cynical view at times.
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.
Possibly they are random villagers who were caught in the crossfire of a conflict between different bending factions. Aang, being the Avatar and a symbol of peace, feels responsible for burying them and ensuring their spirits are at peace.
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.
Fan Xian's death and Qing Kingdom's demise was a line in " Celebrating Years " that appeared at a critical moment in the plot. We can understand that this sentence was said by Wu Zhu. In the plot, Wu Zhu was a powerful character. He had a complicated relationship with Fan Xian. According to the description in the search results, Wu Zhu was the Nanjiang serial killer that Fan Xian and Yan Bingyun could not forget. His true identity hidden behind the scenes was the Temple envoy. In the plot, Wu Zhu and Fan Xian had a conflict. In the end, Wu Zhu killed Fan Xian. This line," Fan Xian dies, Qing Kingdom dies," was said by Wu Zhu in this scene. It meant that Fan Xian's death would lead to the destruction of Qing Kingdom. This sentence contained important information, hinting at the development of the plot and the complicated relationship between the characters. Therefore, Fan Xian died and Qing perished.
Sokka could be one of the main characters. He might be the one helping Aang with his schoolwork, especially in subjects like history or math, using his own knowledge and quick thinking.
Aang might go into a deep state of depression. He has always been an emotional character, and having his heart broken by Katara, someone he loves deeply, could send him into a downward spiral. He might isolate himself from his friends and stop practicing his bending for a while.