I've heard of a fanfic called 'Azula: The Avatar Reborn'. In this one, Azula's journey as the Avatar is filled with challenges as she has to face not only the normal Avatar duties but also her own inner demons and the expectations of those around her. It's a great read if you like exploring different takes on the Avatar concept.
A lesser - known but really interesting fanfic is 'Azula in the Spirit World'. Here, Azula gets lost in the spirit world and has to find her way back. During her journey, she encounters different spirits that force her to confront her own spirit and the darkness within her. It's a very unique take on her character and offers a lot of depth to her already complex personality.
A good Azula fanfic, first of all, should stay true to her character. Azula is a complex and nuanced character. She's powerful, intelligent, but also deeply troubled. So, the fanfic should explore these aspects. For example, it could show her internal conflicts, like her struggle with power and her fear of being abandoned. If it turns her into a completely different person, it's not a good Azula fanfic.
An engaging plot is also key. It could be about Azula's journey to self - discovery or her attempts to regain power. It should be something that makes the reader want to keep reading. Also, the world - building has to be on point. Since it's set in the Avatar universe, getting the details of the bending, the different nations, and their cultures right is crucial. If the fanfic can do all of these things well, it's likely to be a great read.
It should also have an engaging plot. Whether it's about her trying to regain power, or her journey of self - discovery, the story has to be interesting. For instance, a plot where she teams up with unlikely allies to face a common enemy. Moreover, the writing should be of good quality, with proper grammar and vivid descriptions that bring the story to life.
There's also 'Azula's New Path'. This fanfic focuses on Azula trying to find her place in a post - war world. It shows her learning new values and forming unexpected friendships. It's a really interesting take on her character development, and the writing style is engaging.
One great 'Avatar Azula fanfic' is 'The Redemption of Azula'. It shows a different side of Azula, exploring her possible path to redemption. It has really interesting character development and a great plot that keeps you hooked.
I really like 'Azula in the Spirit World'. This fanfic takes Azula on an adventure in the Spirit World, which is a really cool concept. It shows her interacting with different spirits and how that changes her perspective. There are also some really well - written fight scenes. 'Azula's Allies' is also good. It focuses on Azula forming new alliances and how that affects her relationships with the other characters in the Avatar universe.
You can try fanfiction websites like Archive of Our Own (AO3). There are tons of Avatar - related fanfics there, including ones focused on Azula. Just use the search function and type in 'Avatar' and 'Azula' to filter out the relevant stories.
Another option is Reddit. There are subreddits dedicated to Avatar fanfiction. You can ask the community for their favorite Zuko and Azula fanfics, and they'll likely be more than happy to share some great reads. There are often discussions about different interpretations of the characters in fanfics as well.
Their relationship could develop through a series of challenges. For example, they could be forced to team up against a common enemy. This would make them start to respect each other's abilities.