In some fanfics, Black Widow could be an alternate form of a Miraculous holder in the 'Black Widow Miraculous Ladybug' concept. For example, she might hold a Miraculous that gives her the power to use her signature widow's bite in a more enhanced and magical way, and the fanfic could explore how she uses this power to protect Paris and the Miraculous secrets.
There might be a fanfic where Black Widow is a mentor figure to Ladybug in a 'Black Widow Miraculous Ladybug' story. She could teach Ladybug some new fighting techniques and ways to outwit her enemies. This would be really cool as it combines the spy - like skills of Black Widow with the magic - based powers in Miraculous Ladybug.
It could involve a crossover of the two universes. Black Widow might find herself in Paris and get caught up in the fight against Hawk Moth. She could use her martial arts skills to take on the akumatized villains.
There are many popular Miraculous Ladybug fanfics. Some focus on different relationships between the characters, like Marinette and Adrien's adventures outside of their superhero personas. Others might explore the backstories of the kwamis in more detail. For example, there are fanfics that delve into how Tikki came to be and her experiences before choosing Marinette as her holder. Fanfics also often create new scenarios for the characters to face, such as an alternate universe where the Miraculous are used in different ways.
In a 'Black Widow Miraculous Ladybug' fanfic, aside from Ladybug and Black Widow, there could be villains as main characters too. Maybe Hawkmoth, the main antagonist in Miraculous Ladybug, could be a central figure. He would be interested in Black Widow's abilities and might try to either recruit her or find a way to take away her powers if she has any in the fanfic's universe. And Tikki, Ladybug's kwami, could also play a major role as she is the source of Ladybug's powers and could have some interesting interactions with Black Widow.
Well, perhaps she's a mentor figure. Since she has a lot of experience in the superhero/villain world in the Marvel universe, she could teach Ladybug and Chat Noir new fighting techniques and strategies to outwit their enemies.
There might be a fanfic that explores a romantic relationship between them in an alternate universe. In this story, they have to hide their relationship from the other Avengers while still fighting crime together. It could show how they balance their personal feelings with their superhero duties.
A really cool fanfic idea could be a prequel to her time in the Red Room. Maybe it shows how she was recruited, what her life was like before the brutal training, and how she was gradually indoctrinated into the world of the Red Room. It could give readers a deeper understanding of her character's origin.
There's also 'Shadowed Hearts'. In this fanfic, the story takes a more gritty turn. It might explore themes not suitable for younger audiences such as the characters facing extreme hardships and making morally ambiguous choices. But it's important to note that when reading M - rated fanfics, you should be prepared for more intense content compared to the regular, family - friendly 'Miraculous Ladybug' stories.
There might be a fanfiction where the ponies from MLP end up in the Miraculous Ladybug universe. They could be mistaken for new akumas at first, but then they prove their friendly intentions and help Ladybug and Chat Noir fight against Hawk Moth. It would be full of humorous misunderstandings and exciting battles.
One interesting 'Miraculous Ladybug salt fanfiction' could be the ones where characters' personalities are explored in a different light. For example, a fanfiction might show a side of Chloe where she has a more complex backstory that explains her mean behavior rather than just being a one - dimensional bully. Another could be about Marinette facing challenges that are different from the main show, like dealing with false accusations from her classmates in a more extreme way. And there are also fanfictions that might focus on different pairings and how they interact in a 'salt' scenario, which means a scenario where some characters are portrayed in a less favorable light than in the original show.
Another theme is the power dynamics within the superhero world. How Ladybug's leadership as the main superhero affects the others, and how Chat Noir supports her. Fanfictions can explore different scenarios where they have to make difficult decisions regarding their powers and responsibilities, such as when they face a villain who is stronger than they expected and they have to figure out new strategies using their powers.