Haruhi is practical and no - nonsense. In a crossover, she could be the voice of reason among the more outlandish characters. She might be skeptical of the whole superhero and villain situation at first. Meanwhile, Marinette from Ladybug and Cat Noir is a bit clumsy but has a big heart. Her clumsiness could be seen as endearing by the OHSHC members, and her kind heart could help her fit in with the generally good - natured Host Club. The different levels of confidence and self - awareness among the characters would create a lot of interesting interactions. For example, the self - assured Cat Noir might give some of the OHSHC members tips on how to be more confident, while also learning about their unique hosting skills.
One interesting crossover could be a scenario where the members of OHSHC somehow end up in the world of Ladybug and Cat Noir. Maybe they get mistaken for akumatized villains at first due to their flamboyant outfits. For example, Tamaki could be mistaken for a new super - villain because of his princely and somewhat over - the - top appearance. Then Ladybug and Cat Noir would have to figure out that they are just normal (well, as normal as the OHSHC crew can be) people from another dimension. This would lead to a lot of comical misunderstandings and eventually a team - up to fight a real villain.
Obviously, Ladybug and Cat Noir themselves are very popular to focus on. Their relationship, both as heroes and the underlying romantic tension, is a big draw for readers. But also, characters like Chloe can be interesting. You can explore her redemption arc or her struggle with her insecurities in a fanfic. Another popular character is Alya. You could write about her as Ladybug's best friend, how she supports Ladybug and also how she tries to uncover Ladybug's true identity.
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 great 'ladybug and cat noir fanfic' is 'The Miraculous Bond'. It really delves into the deeper relationship between Ladybug and Cat Noir, with some really interesting plot twists that keep you hooked from start to finish.
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.
The personalities of the Harry Potter characters and Gundam pilots would create some interesting dynamics. Gundam pilots are often trained for combat and have a sense of discipline. When combined with the more free - spirited nature of some of the Hogwarts students, there could be some clashes at first. However, over time, they would learn from each other. Harry's sense of justice would be complemented by the Gundam pilots' code of honor. And the more light - hearted characters from Harry Potter could bring some humor to the often - serious Gundam pilots.
Levi from Attack on Titan and Meliodas from Seven Deadly Sins both have strong leadership qualities. They would probably either clash due to their different leadership styles or find a way to work together really well. Levi is more stoic and strict, while Meliodas is more laid - back but still very determined. Their combined leadership could be really interesting in a fanfic.
If the kwami swap involves a kwami with a mischievous nature, Lady Noir's personality could become more playful. She might start cracking more jokes during battles, much like Chat Noir usually does. This would change her overall demeanor and how she interacts with both the villains and Chat Noir. It could also make their partnership more light - hearted or, if Chat Noir isn't used to it, a bit more chaotic as they adjust to this new side of Lady Noir.
One idea could be a time - travel plot. For example, Ladybug and Cat Noir are sent back in time to when the Miraculouses were first created. They have to figure out how to get back to their own time while also protecting the secrets of the Miraculouses in the past. Another idea is a role - reversal. Maybe Ladybug loses her powers for a short time and Cat Noir has to step up even more and take on some of her traditional responsibilities. He could struggle with the different approach needed for leadership.
One popular 'ladybug x cat noir lemon fanfic' might be the one where they go on a magical adventure together in a new Parisian setting. It has really engaging dialogues between Ladybug and Cat Noir.