Tikki and Plagg are often featured as well. They are the Kwamis, and their interactions with their holders and with each other can be really interesting. In a camping fanfiction, Tikki might be worried about finding enough food that she can eat, and Plagg could be causing mischief by trying to steal everyone's camping food.
Marinette and Adrien are the most popular. Marinette as Ladybug has a lot of room for growth in training stories. She can learn new ways to use her Lucky Charm and improve her combat skills. Adrien as Chat Noir is also a favorite. His charm and acrobatic abilities can be developed further in training scenarios.
Lila is often a popular thief character in fanfictions. Given her manipulative nature in the original series, it's easy to imagine her taking on the role of a thief. She could be stealing things to frame Ladybug or gain more power within the school or the city.
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.
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.
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.
Ladybug and Chat Noir are obviously very popular. Since the whole concept of 'the reveal' usually revolves around them, fans are always eager to read about how their identities are finally exposed to each other.
Ladybug is often a very popular character. Her strong and heroic nature makes her a great fit for the wrestling scenarios. Fans love to see her use her acrobatic skills and superpowers in the wrestling ring.
Adrien is another popular character. His dual life as a model and a superhero gives a lot of room for different storylines. Writers often explore his relationship with his father, which is complex in the original series, and how it affects his superhero life in fanfiction.
Well, aside from Ladybug and Chat Noir, Alya is also quite popular in Miraculous Ladybug Oops fanfiction. She is Marinette's best friend and often gets involved in the superhero adventures in some way in the fan stories. Some writers might give her more of a central role, exploring her character more deeply. Another character that can be popular is Hawk Moth. Writers might create new backstories or motives for him in fanfiction.
Marinette and Adrien are also quite popular. Since they are the alter - egos of Ladybug and Chat Noir, in the fanfictions related to the actors, their real - life counterparts might be exploring what it's like to be in the shoes of these characters. They could be having fun with the idea of actually being superheroes or dealing with the secret identities.