There could be. Fanfic writers often explore different and sometimes dark or unexpected scenarios. Azula killing Ozai is a rather extreme and interesting concept that some might write about. You'd have to search through various fanfic communities and websites dedicated to the relevant fandom.
It's not appropriate. The original Avatar: The Last Airbender series is aimed at a wide audience, including younger viewers. 'Lemon' fanfiction often contains adult - themed content. Katara and Ozai have a relationship in the show that is based on enmity and conflict. Turning this into a sexualized relationship in fanfiction is a misrepresentation of the characters and the story, and is not suitable for the general Avatar fan community.
One common theme is redemption. Many fanfictions explore the idea of Ozai seeking redemption for his actions towards Ursa and their family. Another theme is love lost and found. They often show the relationship that was once there between Ozai and Ursa and the possibility of it being rekindled. There's also the theme of family secrets, as their relationship was filled with many secrets that are often explored in fanfiction.
One common theme is the power dynamic. Ozai is a powerful figure in the Fire Nation, and how he wields that power over his baby son, Zuko, is often explored. For example, in many fanfictions, he starts to instill in Zuko the importance of strength and power from a very early age.
The main characters are obviously Toph and Ozai. Toph, the blind earthbender, is known for her strong will and unique way of sensing the world. Ozai, on the other hand, is a complex and often villainous character. In this fanfiction, their personalities and abilities are likely to be explored in new and different ways.
One great 'azula and ozai fanfic' is 'The Fire Lord's Daughter'. It delves deep into the complex relationship between Azula and Ozai, exploring their power dynamics and how Azula tries to gain more of her father's approval. Another one could be 'In the Shadow of the Fire Lord' which shows how their actions impact the Fire Nation as a whole. There are also some fanfics on popular fanfic platforms like Archive of Our Own that you can search for using relevant tags.
One popular Ozai and Mai married fanfiction might be 'The Life of Ozai and Mai' which delves into their married life in a fictionalized version of the Avatar universe. It shows how they deal with political matters together while also exploring their relationship dynamics.
One plotline could be Azula finally realizing the extent of Ozai's abuse and tyranny, and in a moment of self - realization and strength, she decides to take him down. Maybe she discovers some dark secrets of his that make her see him as a threat not just to others but also to herself.
Well, 'A Different Ozai and Ursa' is an interesting fanfiction. It presents a more complex view of their relationship, showing that there were more layers to it than what was shown in the original story. And 'Ozai and Ursa: The Untold Chapters' might be what you're looking for. It fills in the gaps in their story, giving more details about their early days together and how things started to go wrong.
Well, one possible plot could be that Toph and Ozai are forced to team up in an unexpected situation. Maybe there's a new threat to the world and they have to put aside their differences. Another plot could involve Toph trying to reform Ozai and make him see the error of his ways. It could be a story of redemption for Ozai with Toph as the guiding force.