The kwamis would be really interesting characters to include. Plagg and Tikki could offer their unique insights and humor. Trixx could also be there to play some pranks or help Alix with her Miraculous - related problems. Their presence would add a touch of magic and fun to the fanfiction.
One idea could be that they team up to create a comic book based on the Miraculous heroes. They could use their different perspectives, Alix's knowledge of history (since she's the Rabbit Miraculous holder in the future) and Nathaniel's creativity in art and storytelling.
One way to find good authors is to search for fanfiction awards or recognition in the Miraculous Ladybug fandom. Authors who have won or been nominated for awards for their Alix - centric stories are likely to be very good. They usually put a lot of effort into character development, plot, and staying true to the Miraculous Ladybug universe.
One great Alix and Kim fanfiction could be where they team up for a school project. In this story, their different personalities create some hilarious and heartwarming moments. Alix's tomboyish nature and Kim's athleticism make for an interesting dynamic as they struggle to meet the project's requirements.
There could be a fanfiction where Alix gets a new Miraculous - related power temporarily. This would change her role in the team dynamics. She might struggle to control it at first but then use it to help Ladybug and Chat Noir in a unique way, like being able to see the future more clearly during battles.
Well, in the Miraculous Ladybug universe, there are so many possibilities for their storylines. They could get involved in the superhero - related events in some unique ways. For example, they might accidentally stumble upon a villain's lair and have to use their wits and skills to escape. Alix's sharp mind and Kim's bravery would be put to the test. Also, their relationships with other characters in the show can add depth to the fanfiction. If they are friends with Marinette or Adrien, how would that affect their own relationship? There are just so many aspects to explore.
There are quite a few out there. 'Alix and Kim: A Different Kind of Duo' is another good one. In this fanfic, it starts with a simple bet between them at the pool. Kim challenges Alix to a swimming race, and from there, their relationship evolves. It's full of humorous moments as well as some deeper, more emotional scenes as they start to understand each other on a different level.
Obviously, Alix herself is a main character. As the holder of the bunny miraculous, she is at the center of most of the stories. She's a brave and adventurous girl, always ready to face challenges with her unique powers.
The fact that they are both involved in the creative arts makes them unique. Fanfiction writers can use this aspect to create stories that involve art, writing, and the magic of the Miraculous Ladybug world all at once. For example, they could use their creative powers to create new Miraculous items or to defeat an akumatized villain in a very different way than Ladybug and Chat Noir.
Marinette's friends like Alya are also popular. In a child fanfiction, Alya could be the one who encourages the child protagonist to believe in the Miraculous heroes. She could share her knowledge of the Ladyblog and help the child get closer to the action. Also, Nino could be involved, maybe he creates a new type of music that has an effect on the akumas.
Definitely Superman if it's a DC crossover. His super strength and ability to fly could add a whole new dynamic to the battles against Hawk Moth. He could also be a mentor figure to Ladybug and Chat Noir, teaching them about using their powers more responsibly on a global scale.