In the fanfiction, the plot could start with Cat Noir proposing to Ladybug in a really romantic and unexpected way. Then they would start planning the wedding. Ladybug might be a bit hesitant at first because she's worried about how it will affect their superhero duties. But as they work through it, they find ways to balance their personal and superhero lives. And at the end, they have a magical wedding ceremony filled with love and hope for the future.
One possible plot is that after years of fighting side by side, Ladybug and Cat Noir start to have dreams about a future together. They then start to secretly date and fall deeply in love. When they decide to get married, they face opposition from some of their friends who are worried about the implications for their superhero work. However, they prove that their love is strong enough to handle both their duties and their relationship. The wedding could be a grand affair with lots of Parisian charm and all their allies in attendance.
Obviously, their best friends like Alya and Nino would be there. Alya could be Ladybug's maid of honor, and Nino could be Cat Noir's best man. Also, all the other superheroes they've worked with in Paris would be invited. And of course, their families, if their identities were revealed by then. Maybe even some of the citizens of Paris who have been saved by them over the years would show up to celebrate this special occasion.
One possible plot could be that Naruto is somehow transported to the world of Ladybug and Cat Noir. He might initially be confused but quickly adapt his ninja skills to the new environment. He could team up with Ladybug and Cat Noir to fight against a common enemy, perhaps an akuma that has powers similar to some of the foes in the Naruto universe. Naruto's chakra and jutsu would add a new dimension to their battles.
One possible plot could be that Hawkmoth manages to finally corrupt Cat Noir. He might start causing chaos in Paris, attacking Ladybug instead of helping her. Ladybug would then be in a difficult situation, having to either try to save her partner or defeat him to protect the city.
One idea could be a story where Ladybug and Cat Noir get trapped in an alternate dimension. They have to figure out how to work together in this strange new world to find a way back home. They might encounter new villains or versions of their friends that are very different.
Definitely Tikki and Plagg. These Kwamis are essential to the Miraculous universe. Their interactions with Cat Noir and Ladybug, as well as their own little quirks and personalities, can make for really fun fanfiction. Additionally, Sabrina, Chloe's sidekick, can be an interesting character to include. She could have her own story of breaking free from Chloe's control or getting involved in the hero - villain drama in some unexpected way.
In some ways, it's a very interesting plot twist. It allows for exploration of different character aspects. Cat Noir stealing the Miraculous can show his more complex side, his insecurities or the lengths he might go to in certain situations. However, it also risks ruining the positive relationship that fans love between him and Ladybug if not handled carefully.
One consequence could be a power imbalance in Paris. Since Ladybug's Miraculous is crucial for maintaining the balance against evil. If Cat Noir takes it, he might not be able to use it as effectively as Ladybug, leading to potential chaos as Hawkmoth could take advantage.
If Cat Noir steals Ladybug's Miraculous in a fanfiction, it could lead to a dark turn in the story. Maybe he's being controlled by an outside force. This would shatter the trust between them and change the whole dynamic of their fight against evil. The city would be in more danger as Ladybug is a key protector.
Well, perhaps the plot could involve them trying to balance their superhero duties with raising their baby. They might have to keep the baby's identity a secret from Hawk Moth to protect it from danger.
Well, a great plot for Miraculous Ladybug and Cat Noir fanfiction could be an alternate universe where they are not superheroes but normal students. However, they start to notice strange things happening around them that seem related to the Miraculous. They then have to find a way to regain their powers or discover new ones to save the day. Also, a story where they get trapped in a villain's illusion world and have to fight their inner demons while trying to break free. Or perhaps a fanfiction where they have to deal with a new villain who can copy their powers and they have to find a way to outwit this new threat.