Ladybug and Cat Noir are definitely the most popular. They are the main heroes in the Miraculous Ladybug universe, so it's natural that they are often the focus in fanfiction. Writers love to explore their relationship, powers, and backstories.
Some fanfictions also make the villains really stand out. For instance, a new villain who has a special connection to the Bee Miraculous. This villain might be trying to steal the Miraculous for a unique reason, like using its power to open a portal to another dimension. Their complex motives and devious plans can add depth to the story.
Marinette and Adrien are still very popular in Miraculous Lemon Fanfic. Their relationship is a central focus in the original show, and in the fanfics, it often gets explored in more depth, whether it's in a romantic or a platonic way.
Most likely, we'll see the Puppeteer as a central figure. Alongside her, Ladybug and Chat Noir are bound to be there as they always are to save Paris. Also, Alya might be involved as she often helps Ladybug. Since the Puppeteer has a history of using dolls, perhaps there could be a new character who is an expert in doll - making or some sort of antique doll collector who has some connection to the Puppeteer's powers or origin.
Well, the main characters are usually Marinette and Adrien. Marinette, as Ladybug, is the hero who has to save Paris from the akumas. Adrien, as Chat Noir, is her partner in fighting crime. In the Heartstrings fanfiction, they might have some new character traits or face different challenges compared to the original series. There could also be other important characters like Alya, Marinette's best friend, who might play a bigger role in uncovering secrets or helping Ladybug.
The main characters in the Miraculous Ladybug original story are Marinette Dupain - Cheng and Adrien Agreste. Marinette is a normal girl who transforms into Ladybug, a superheroine. Adrien, on the other hand, is a model who becomes Cat Noir. They fight against villains in Paris to protect the city and its people.
Obviously, Alix herself is a main character. As the holder of the bunny miraculous, she is at the center of most of the stories. She's a brave and adventurous girl, always ready to face challenges with her unique powers.
Well, it varies a lot. Sometimes the fanfics might feature alternate versions of the main characters with different personalities or goals. Or they could introduce completely original characters with their own quirks and motivations.
Once upon a time, in the deep blue sea, there was a miraculous mermaid named Marina. She had a special power - the ability to heal any wound with a touch of her pearl - like scales. One day, a human sailor named Leo fell overboard during a storm. Marina found him and used her power to save his life. Leo was amazed by her beauty and kindness. He visited the sea often after that, and they became friends. Their friendship grew into love, but they knew there were many obstacles. Marina couldn't stay on land for long, and Leo couldn't live in the sea. However, with the power of their miraculous bond, they found a way to be together. They discovered an ancient magic that allowed Marina to transform into a human for short periods, and Leo learned to swim and hold his breath for longer. Their love story became a legend in both the human and mermaid worlds.
Hawk Moth is often a very popular character in dark fanfiction. His villainous nature gives a lot of room for exploration in a darker context. Writers can delve into his motives more deeply and make him even more menacing.