Well, you could start by having everyone come dressed as their favorite character from the Miraculous Ladybug fanfiction. Then, you could have a mini - 'akuma attack' game. One person is chosen as the 'akuma' and they have to tag others. Those who are tagged then have to do a small 'de - akumatization' task, like answering a trivia question about the show. For the decor, lots of red and black balloons to represent Ladybug's colors.
In my opinion, Ladybug would be the top choice. Her costume is not only super cute but also represents the hero of the story. However, Cat Noir is also a strong contender. His cool and mysterious look attracts a lot of fans. Additionally, some might choose to dress up as Chloe, for her more villain - esque style that still has a touch of glamour. It really depends on the fans' personal preferences and how they relate to the characters in the fanfiction.
One idea could be a masquerade - themed party. All the characters from the Miraculous Ladybug universe could show up in elaborate masks and costumes. It would add an air of mystery and elegance to the party.
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.
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.
To make a Miraculous Ladybug Halloween costume based on fanfiction, start with finding a pattern for a leotard or bodysuit. Cut the red fabric according to the pattern. Now, when it comes to the details, fanfiction often gives different takes on Ladybug's look. For example, some fanfictions might describe a more armored - like Ladybug. So, you could use some lightweight plastic or cardboard to create armor - like pieces and attach them to the costume. Don't forget the mask. You can make it out of red fabric and black elastic, and add some extra details like small rhinestones to make it sparkle, just like in some fanfiction descriptions.
In an akumatized Ladybug fanfiction, the akuma might enhance her powers in unexpected ways. For example, her Lucky Charm could become a more powerful and unpredictable object. Her akumatized form might also have a darker and more menacing look, perhaps with a more aggressive fighting style. Writers could explore how the heroes and villains interact with this changed Ladybug.
In this 'Miraculous Ladybug Criminal Ladybug Fanfiction', there could be a lot of potential storylines. One possibility is that an external force is influencing Ladybug to commit crimes. It could be a new villain who has found a way to manipulate the Miraculous. This would create a great conflict as Ladybug has always been the symbol of good. Her friends and allies would be in shock and would have to find a way to stop her without hurting her. The story could also explore her internal struggle, as she might be aware of what she's doing but unable to stop herself.
A new villain could have a weapon that specifically targets Ladybug's powers. When she tries to use her yo - yo or her powers of creation, it backfires and causes her harm. This would force her to rely on her wits and Chat Noir more than ever. They would need to find a way to neutralize the weapon and heal Ladybug.
In a fanfiction, Ladybug could get hurt as a result of a trap set by Hawkmoth. He might have studied her fighting patterns and set up a situation where she is lured into a place full of obstacles that cause her physical harm. This would not only test her physical strength but also her mental resilience as she tries to figure out how to escape and continue her fight against evil.