In a Star Wars crossover, Luke Skywalker would be a great addition. His Jedi skills and knowledge of the Force could be very useful. He could train the Miraculous holders in a different kind of combat and help them understand the importance of balance, which is similar to the balance they need to maintain in their own powers.
Definitely Superman if it's a DC crossover. His super strength and ability to fly could add a whole new dynamic to the battles against Hawk Moth. He could also be a mentor figure to Ladybug and Chat Noir, teaching them about using their powers more responsibly on a global scale.
Marinette's friends like Alya are also popular. In a child fanfiction, Alya could be the one who encourages the child protagonist to believe in the Miraculous heroes. She could share her knowledge of the Ladyblog and help the child get closer to the action. Also, Nino could be involved, maybe he creates a new type of music that has an effect on the akumas.
Ladybug and Chat Noir are obviously the most popular. They are the main heroes, and their dynamic relationship is always interesting to explore in fanfiction. Marinette and Adrien, their civilian identities, are also great to include as it adds a layer of complexity with their double lives. Tikki and Plagg, the Kwamis, are also quite popular. Their cute and sometimes mischievous personalities can add a lot of humor to the story.
Marinette and Adrien are obvious choices. Their relationship, both as normal students and as superheroes, provides a lot of material for fanfiction. Their crushes on each other, and the comical misunderstandings that often occur, can be explored in a school setting.
Ladybug and Cat Noir themselves are obviously very popular. Marinette (Ladybug) and Adrien (Cat Noir) have complex personalities and their relationship is full of potential for fanfiction. Tikki and Plagg, their Kwamis, are also great to include. They can add humor and also provide important insights into the Miraculous lore. Then there's Alya, Marinette's best friend. She can be a great supporting character, either helping Ladybug or getting into some comical misunderstandings.
Ladybug and Cat Noir themselves are very popular. Writers often like to explore their relationship further, whether it's developing their romantic feelings or their friendship as superheroes. Marinette and Adrien, their civilian identities, are also commonly included. Fans enjoy writing about their everyday lives and how they balance that with their superhero duties.
Marinette is also very popular. Fanfiction often delves into her life as a normal girl, her struggles with school, her crushes, and how she balances being Marinette with being Ladybug. Her clumsy but endearing personality gives a lot of room for interesting storylines.
Aside from Ladybug and Chat Noir, Hawk Moth is quite popular in fanfiction. He is the main villain, and many fanfiction writers like to explore his backstory and motives further. There are also some side characters like Alya, Marinette's best friend, who is popular as she often gets involved in the superhero adventures in an indirect way. And of course, Adrien, who is Chat Noir, is a fan favorite due to his charming personality both as a superhero and as a civilian.
Hawk Moth is another character that shows up a lot in fanfiction. Writers like to explore his motives more deeply, or come up with scenarios where he has a change of heart or forms an unexpected alliance. His complex character makes him an interesting subject for fanfiction writers to play around with.
Ladybug and Chat Noir are definitely popular. They are the main characters in the original, so in PV fanfiction, they often take center stage. Their relationship, both as superhero partners and the potential for a romantic one, is a big draw for writers. Marinette and Adrien are also popular as their civilian identities. Writers like to explore how they balance their normal lives with their superhero duties.
Well, obviously Ladybug and Chat Noir should be in it. They could interact with the cousins and help them learn about their powers. Then there could be the villain characters like Hawk Moth. His presence can create conflict and challenges for the cousins. Another good character could be Master Fu. He can guide the cousins in understanding the deeper meaning and responsibilities of the Miraculous.