One interesting plot could be Miss Fortune having to team up with Ladybug and Chat Noir in a situation where they initially suspect her. For example, a new villain emerges who has the power to create illusions of past akumas. Miss Fortune's unique abilities might be the key to seeing through these illusions, but Ladybug and Chat Noir are hesitant to trust her at first.
Another plot could involve Miss Fortune getting involved in a love triangle with characters from the Miraculous Ladybug universe. Perhaps she has feelings for Chat Noir, but Chat Noir is in love with Ladybug. This could create a lot of drama and interesting interactions between the characters, all while they are trying to save Paris from the latest akuma threat.
She could be a love interest for one of the main characters. Maybe Chat Noir falls for her charm, which creates some tension in his relationship with Ladybug. It would add a new layer of drama to the story.
One interesting plot could be Miss Bustier getting involved in a Miraculous - related adventure herself. Maybe she discovers a hidden Miraculous and has to learn how to use it to protect the school from a new villain. Another plot could be a backstory exploration of Miss Bustier's life before she became a teacher at the school in the Miraculous Ladybug world. For example, her relationships, dreams, and how they shaped her into the person we see in the show.
One possibility in Miss Fortune in Miraculous Ladybug fanfiction could be that she is a new villain. She might use her charm and wits to try and steal the Miraculouses. For example, she could pretend to be an ally to Ladybug and Cat Noir at first, only to double - cross them later when she gets close to the Miraculouses.
Tikki and Plagg, the kwamis of Ladybug and Chat Noir respectively, could also be considered main characters in a sense. Their wisdom and powers are crucial in the story. In a Miss Fortune fanfiction, they might interact with Miss Fortune in unexpected ways, like giving her advice or even having some sort of special connection with her.
Well, one interesting plot could be about Ladybug and Chat Noir having to face a villain who can manipulate time. This would put their skills and relationship to the test as they try to outwit the baddie and protect Paris. Another plot might involve a new Miraculous holder emerging and how they interact with Ladybug and Chat Noir, whether it's as an ally or a potential adversary.
One interesting plot could be an alternate universe where Ladybug and Chat Noir have different powers. Maybe Ladybug has the power of ice instead of her usual creation abilities. Another plot could be a time - travel story where they go back to the very beginning of Hawk Moth's reign and try to stop him before he becomes too powerful. And there could also be a story where Ladybug and Chat Noir have to team up with their civilian selves to solve a mystery.
In some fanfictions, there could be a plot where the masks play a role in a time - travel scenario. Maybe Ladybug and Chat Noir find a mask that sends them back in time to the origin of the Miraculous. They then have to make sure not to change history while also learning something crucial about their powers. Also, a plot could be about a mask - making competition in Paris where the villain tries to use it as a cover to steal the Miraculous.
One interesting plot could be the robots in Paris going haywire and Ladybug and Chat Noir having to figure out a new way to fight them since their usual powers might not be as effective. Maybe the robots are being controlled by a new villain who uses technology in a way the heroes haven't seen before.
A really cool plot could be that an international fashion competition is held in Paris and Marinette enters with her Miraculous - themed designs from the boutique. But Hawk Moth tries to use this event to steal the Miraculous. So, the other characters have to not only support Marinette in the competition but also protect the Miraculous at the same time.
One interesting plot could be a crossover where the characters from Miraculous Ladybug end up in the world of TAWOG. Maybe Ladybug and Cat Noir have to adapt to the wacky rules and strange creatures in Elmore. Another plot might involve a character from TAWOG getting a Miraculous and having to learn how to be a superhero in their own zany way. For example, Gumball could get the Ladybug Miraculous and use his unique problem - solving skills from his daily adventures in Elmore to fight akumas.