One great 'Aang and Katara and Zuko' fanfiction is 'The Fire and Water Alliance'. It delves into how they work together to rebuild the world after the war. Their different abilities and personalities create interesting dynamics.
You can start by looking on Archive of Our Own (AO3). It has a large collection of fanfictions including many about Aang, Katara, and Zuko. Just search for their names in the search bar.
Another theme is redemption. Sometimes, the fanfics explore the idea of Azula's possible redemption. Aang, being the symbol of peace and balance, might be the catalyst for her change. Their interactions could lead to Azula re - evaluating her actions and beliefs. This theme adds depth to their relationship in the fanfics.
One popular 'zuko x katara x aang fanfic' is 'The Elemental Bond'. It explores their complex relationships in a post - war world. The author does a great job of showing how they interact and support each other. Another one is 'Triple Alliance' which delves into their adventures together, with some interesting character development for all three. And 'Harmony Among the Elements' is also good, as it focuses on how their different personalities and powers can work together in harmony.
You can try some popular fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfics, and you might be able to find some great 'azula vs aang' ones there. Just use the search function on the site.
In these fanfics, the relationships usually develop through shared experiences. Maybe they go on a quest together. During this quest, they have to camp out, share food, and protect each other from danger. Zuko might show his more vulnerable side to Katara and Aang, which helps them to forgive his past wrongs. Aang, with his positive and open - hearted nature, can also help Katara and Zuko to be more in tune with their spiritual sides. And Katara's nurturing nature can heal the emotional wounds between them, leading to a stronger and more complex relationship.
In some fanfictions, Aang's connection to his past lives plays a crucial role. He could draw on the wisdom and skills of previous Avatars. They might guide him on how to defeat Azula specifically. He could learn a new bending technique from one of his past lives that gives him an edge over Azula's firebending, like a unique way of using water to extinguish her most powerful fire blasts.
Some fanfictions explore their role in rebuilding the world after the war. Zuko and Katara could be working together to restore balance between the nations. This kind of fanfiction often shows their leadership skills and how they complement each other.
There could be a fanfic about their alliance. Maybe in an alternate universe where they have to team up against a common enemy. They could start off as enemies but gradually learn to respect and rely on each other.
The relationship would change drastically. Before the pregnancy, they were often at odds. But now, they are bound by this new situation. Zuko would probably be more involved in Azula's life, and Azula might start to trust Zuko more. They would have to communicate better to deal with the upcoming challenges of having a baby, like preparing a nursery, choosing a name, and dealing with the reactions of their family and the court.