In this fanfiction wedding, not only their friends but also some of the heroes they've worked with in the past could be guests. Rena Rouge and Carapace would be there, having played important roles in many battles. Maybe even some of the one - time heroes like Pegasus or Viperion could show up. Ladybug's parents would be there with open arms, and Adrien's bodyguard could also be present, having seen Adrien grow up. And Paris itself could be considered a 'guest' in a way, as the city has been a big part of their lives and the reason for their superhero existence.
Well, perhaps other superheroes from different cities could be special guests. They could come to the Parisian ball to share their experiences and strategies in fighting villains.
The kwamis could also be special guests. They could be floating around, giving out little bits of their special powers as party favors, like Tikki giving out mini - lucky charms or Plagg sharing some cat - like agility for a short time.
In a Miraculous Ladybug wedding fanfiction, it could start with Ladybug having a dream about marrying Chat Noir. She wakes up flustered but realizes she has some real feelings for him. Chat Noir, on the other hand, has been secretly planning a big proposal. When he finally does it, Ladybug says yes. For the wedding, they decide to have it in a secret garden that only they know about. Marinette's family and Adrien's father (who has had a change of heart) come together to help with the arrangements. The wedding ceremony is filled with magic, as their kwamis play little tricks to make the day even more special. And at the end of the day, they transform into Ladybug and Chat Noir and have a private dance on the rooftops of Paris.
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.
It could be Alya. She's very curious and adventurous. Maybe she gets too close to some sort of werewolf lore or a werewolf in disguise while investigating for the Ladyblog. And then she gets bitten and turns into a werewolf. This would add a whole new layer of drama to her relationship with Marinette and the other characters.
Another possibility could be a new character introduced specifically for the fanfiction. Maybe a powerful and charming hero from another city comes to Paris to help Ladybug and Chat Noir. He and Ladybug develop a connection, and he could end up being the father. This would create a lot of drama and new storylines, especially when it comes to how Chat Noir reacts to the situation.
Marinette and Adrien, as Ladybug and Cat Noir, finally decided to tie the knot. The city of Paris was filled with excitement. The wedding took place in a grand cathedral. Ladybug walked down the aisle in a beautiful white dress with red accents, while Cat Noir waited at the altar in his dashing black suit. Their kwamis were there too, Tikki and Plagg, looking on with pride. After the ceremony, they transformed briefly to soar over Paris as a newlywed superhero couple, sharing a kiss in the sky.
In a Miraculous Ladybug sleepover fanfiction, the characters might have a lot of fun. They could play games like truth or dare, which could lead to some interesting revelations. For example, Marinette might accidentally let slip some of her feelings for Adrien.
The girl might be a new superhero in training. She comes to Paris to learn from Ladybug and Chat Noir. During her time there, she catches the eye of one of them, and the story of'marry that girl' begins. She could bring a fresh perspective to the Miraculous team and also add a new dynamic to the relationship in the fanfic.
A villain that has the power to steal emotions could be a great choice. Imagine this villain targeting Edendaphne's friends and allies, draining their positive emotions. Edendaphne would have to find a way to not only stop the villain but also restore the emotions of those affected. It would be a very emotional and intense story.