A plot idea could be that a villain creates a prosthetic - like device that can steal the powers of the Miraculous holders. Ladybug and Chat Noir have to figure out how to stop this device and also deal with the fact that some of their friends or allies might be affected by it. Or perhaps there's a character who has always been self - conscious about their prosthetic, but when they get a Miraculous, they learn to embrace it and see it as a strength. They could inspire other characters with disabilities in the story.
Well, there could be a story where an akuma targets people with prosthetics, believing them to be 'imperfect'. This forces the Miraculous Ladybug team to not only protect those with prosthetics but also show the world that they are just as strong and important as anyone else. A different idea is that a character discovers an ancient Miraculous - related prosthetic that gives them new powers. They have to learn how to control these powers while also dealing with the fact that they are now different from the other heroes.
Well, how about this? Cinderella is actually an ancestor of Marinette. And Marinette discovers an old diary of Cinderella's that has some hidden secrets about the Miraculous. It seems that Cinderella had a connection to the Miraculous long ago. This discovery leads to a new adventure where Ladybug has to follow the clues in the diary to find a lost Miraculous that could be very powerful. Along the way, she meets characters who are like the ones in Cinderella's story, but with a Miraculous Ladybug twist.
One idea could be to create a Ladybug costume that is tattered and covered in fake spiderwebs to give it a spooky Halloween twist. You could also add some fake blood splatters to make it look like Ladybug has been in a battle. Another option is to make a dark version of the costume, with a black instead of red suit and purple spots.
One creative idea is a crossover with the Jurassic Park world. Imagine Ladybug and Cat Noir having to fight dinosaurs while still maintaining their secret identities. Another is a crossover with the Alice in Wonderland world. The wacky and strange nature of Wonderland would make for an interesting backdrop for the Miraculous heroes.
One idea could be a story where the Peacock Miraculous has a unique malfunction that causes it to create unexpected akumas. For example, instead of creating the usual villains, it creates akumas that have the power to spread positive emotions but in a chaotic way that still disrupts Paris. Another idea is a fanfiction where the holder of the Peacock Miraculous has to team up with Ladybug and Chat Noir to fight against an ancient evil that is specifically drawn to the power of the Peacock. This could involve exploring the history of the Miraculous and its connection to this new threat.
One idea could be Multimouse having to team up with an unexpected ally, like a villain who has a change of heart for a short time. Another could be Multimouse getting lost in an alternate dimension and having to find her way back while facing new challenges.
One idea could be Ladybug and Chat Noir having a heart - to - heart conversation in bed after a particularly tough battle. They could share their fears and insecurities that they usually hide behind their superhero personas.
One idea could be a story where the child of Ladybug and Chat Noir discovers their parents' secret identities by accident. Maybe they find a hidden Miraculous box in the attic and start to figure out what it means.
One plot idea could be that Ladybug and Chat Noir see a future where Paris is in ruins because they failed to stop Hawk Moth. This would give them the motivation to find a new strategy in the present, like seeking out new allies or uncovering a hidden power of their Miraculouses.
For a Miraculous Ladybug class fanfiction, a plot about a cursed object in the classroom could be interesting. The object spreads negative energy, causing the students to fight and argue more. Ladybug and Chat Noir suspect that it's an akuma - related thing, but they can't find the akuma. As they investigate, they discover that it's actually an ancient cursed item that was accidentally brought into the class. They have to find a way to break the curse without revealing their identities, and also deal with the fact that their classmates' relationships are falling apart because of the curse.
Maybe there's a werewolf akuma. Hawkmoth takes advantage of an already existing werewolf in the city and akumatizes it. This werewolf - akuma has enhanced powers and is causing chaos. Ladybug and Chat Noir must figure out how to defeat it. They might need to discover the true identity of the werewolf to break the akuma's hold. It could be a person who was bitten recently and is struggling to control their new form.