One great 'Avatar Katara and Zuko' fanfic is 'The Fire and the Water'. It really delves into their relationship post - war. It shows how they have to work together to rebuild the world. Another one is 'A New Alliance' which focuses on their growing friendship and how they learn from each other's cultures. There's also 'Bridging the Divide' which is a beautifully written story about how they overcome their initial differences.
Well, a common theme in fanfiction is their romantic adventures. Fanfic writers love to imagine Aang and Katara going on secret dates to beautiful, hidden places. These could be secluded islands or magical caves. Their relationship in fanfiction can also be a bit more complex than in the original series. There could be misunderstandings due to their different upbringings. Aang being the last Airbender with a more carefree nature at times, and Katara being a strong - willed Water Tribe girl.
Well, first of all, it should stay true to the essence of the characters. Katara is a strong - willed and compassionate waterbender, and Zuko is a complex character with a troubled past. A good fanfic will explore these traits in the context of their relationship. It could also introduce new and exciting storylines that are consistent with the Avatar world. Maybe they go on a quest together that forces them to rely on each other. And of course, the chemistry between them has to be palpable, whether it's a friendship or a romantic relationship.
There might be a fanfiction where Katara and Ariel team up. Since Katara is from a world with different magic and Ariel has her own charm, they could combine their strengths. They might face a common enemy that threatens both their worlds, like an evil sea witch who wants to steal Katara's bending ability and Ariel's voice for some dark purpose.
Create a unique plot. You could have a portal open between the Avatar world and the Little Mermaid's world. This would bring Katara and Ariel together. Then, introduce a conflict like a power - hungry sea creature that wants to take over both worlds. They have to work together to stop it. Don't forget to add details about how Katara's bending works underwater and how Ariel's mermaid abilities can help on land.
I liked 'Katara and Zuko's New Beginnings'. It's a fanfic that takes place after the end of the series. It focuses on how they navigate the new world order together. There are some really sweet interactions between them as they try to build a new life for themselves and their friends. It also has some great action scenes where they use their bending abilities side by side.
The setting and plot should tie in well with the Avatar universe. A fanfic that has them travel to different parts of the world, like exploring ancient Fire Nation ruins or hidden Water Tribe enclaves, can be really engaging. And of course, the dialogue has to be on point. Their conversations should be filled with the tension that comes from their different backgrounds and the new - found respect and friendship that develops over time.
One memorable moment in fanfiction could be their wedding. It's often depicted as a grand celebration with all the four nations coming together. The air is filled with joy and the hope for a new future. Another moment could be when they first confess their love to each other in a very private and tender setting, away from the chaos of the world.
One common plot idea is Aang and Katara facing challenges in their relationship due to their different cultural backgrounds. For example, Aang being an Air Nomad and Katara a Water Tribe member.
You can try some popular fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfictions, and you can search for 'avatar aang and katara love' to find relevant works.