Katara is one of the main characters in the Katara Avatar Graphic Novel. She is a waterbender from the Southern Water Tribe. She has long hair and is very skilled at using water in various forms for combat and healing.
Katara could be heartbroken. She might initially be in denial, not believing that Aang has actually left. Then she could become angry, feeling betrayed by Aang's sudden departure.
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.
Toph could be another main character. She has a unique perspective and her earthbending skills could be useful in various situations while dealing with baby Katara. For example, she could create a safe enclosure for Katara when they need to rest. Also, Gran - Gran might play an important role. She has a lot of wisdom and experience, and she could provide some insights on how to deal with a baby and perhaps some clues on how to reverse the transformation.
In a lot of 'Katara gets hurt' fanfictions, she can be hurt in combat. For instance, in 'Katara's Battle Wounds', she's fighting against a group of bandits and gets slashed by a sword. However, there are also fanfictions where she gets hurt due to accidents. In 'Accidental Hurt to Katara', she trips over a hidden root while running and breaks her leg. And in some more complex stories like 'Katara's Mysterious Hurt', she's affected by a strange curse that slowly weakens her and causes her pain.
Sokka would be protective of his sister. He would probably start by trying to negotiate with Zuko's side to call off the marriage. If that doesn't work, he might come up with a plan to rescue Katara, perhaps enlisting the help of their other friends and allies.
You can start by searching on popular fanfic websites like Archive of Our Own (AO3). Just type in 'Katara Zuko' in the search bar, and a whole list of relevant fanfics will pop up. You can then sort them according to your preferences, like by popularity or word count.
You can try fanfiction websites like Archive of Our Own (AO3). It has a large collection of fan - created works, and you can search for 'dark Katara fanfiction' specifically in the search bar. There are likely to be many different stories there to explore.