One plot idea could be Marinette having to deal with the pressures of being a princess while also being Ladybug. For example, she might have to attend royal balls and diplomatic events in her princess role, all while secretly protecting Paris as Ladybug. Another idea is that an evil villain targets her specifically because of her dual identity, trying to take over both the kingdom and Paris. Maybe there could also be a plot where she has to choose between her duties as a princess and her responsibilities as Ladybug, creating an internal conflict.
Well, an interesting plot could be that Marinette, as princess, has to form alliances with other kingdoms to fight a common enemy. But some of these kingdoms have different views on the use of the Miraculous. This causes tension as she tries to convince them to work together. In addition, a plot where Marinette's princess identity is revealed to the public in Paris could lead to a whole new set of challenges. People might start treating her differently, and she has to figure out how to maintain her normal life and her superhero duties.
A cool plot could be that Marinette discovers that her princess status is somehow connected to the Miraculous powers. Perhaps there are ancient secrets in the royal family related to the Miraculous. So she has to explore her family's history to understand more about her powers and how to defeat a new, powerful villain. Also, a love triangle between Marinette as princess, her civilian self, and Adrien could be interesting. Adrien might not initially know that Marinette is the princess, leading to some comical and romantic misunderstandings.
One plot idea could be that Marinette and Felix are paired up for a school project. Felix, initially cold, starts to see Marinette's kindness and creativity, and they develop an unexpected friendship. This could lead to some comical moments as Marinette tries to hide her Ladybug identity from him while Felix is being his usual perceptive self.
She could be turned into a mouse - like creature by an experimental akuma attack. As a mouse, she discovers new parts of Paris that are usually hidden from humans. This could include secret underground tunnels or the rooftops in a whole new perspective. She might also meet other kwamis who are more active in these hidden areas.
A possible plot idea is that Marinette is akumatized after being wrongly accused of something at school. Her akumatized form could have the power to manipulate people's memories, making them believe false things about their friends. This would cause a lot of chaos and mistrust in Paris. Chat Noir would have to find a way to reach the real Marinette inside the akumatized shell and convince her to break free. It would be a story full of drama and action.
One interesting plot could be that Marinette - as - Kwami is accidentally discovered by Hawk Moth. He tries to capture her to use her powers for his evil plans. Marinette then has to use her wits and any new Kwami - like abilities she has to escape and warn Ladybug (who she can't transform into at the moment). This would create a lot of tension and action in the fanfiction. Also, it could explore how Marinette feels being in such a vulnerable state.
One idea could be that Marinette vomits due to extreme stress. Maybe she's facing too many akuma attacks in a short time and the pressure gets to her physically. Another could be related to a strange side - effect of using the Ladybug Miraculous. For example, if she overuses her powers in a short period, it might cause some sort of physical reaction like vomiting.
One plot idea could be that Princess Justice discovers a new Miraculous that has been hidden for centuries. This new Miraculous could have unique powers that she has to learn to control while also facing off against a new villain who is after the power of this Miraculous.
A really interesting fanfiction idea could be that Lila and Marinette switch personalities for a day. This would be a comical yet thought - provoking situation. Lila would have to deal with Marinette's responsibilities and kindness, while Marinette might struggle with Lila's devious ways. It could lead to both of them having a new perspective on each other.
One idea could be that Hawk Moth is behind the kidnapping. He might have discovered Marinette's identity as Ladybug or suspect her. He could use her to try and get the Miraculous. Maybe he offers a trade to Chat Noir, the Ladybug Miraculous for Marinette's safe return.
One great plot idea could be a story where Marinette and Adrien are paired up for a school project that requires them to travel to a different city. This would force them to spend a lot of time together outside of their usual Parisian setting. They could discover new things about each other and grow closer. Another idea is a fanfiction set in a future time where they have both retired as superheroes. They start to reminisce about their past adventures and realize how much they've been through together, which reignites their feelings in a more mature way. And a third idea could be a story where they get trapped in an alternate dimension. There, they have to rely solely on each other to find a way back home, which deepens their bond.
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.