One idea could be that Marinette (from Miraculous Ladybug) discovers a magical seashell that transports her to the underwater world of The Little Mermaid. There, she meets Ariel and they team up to fight an underwater villain who is stealing the magic of both the surface and the seabed. Maybe the villain is after the Miraculous and Ariel's voice for some dark purpose.
One great fanfiction could be where Marinette discovers she has mermaid powers while still being Ladybug. It might start with her finding a strange shell that gives her the ability to transform into a mermaid. In the story, she could use her mermaid form to access new parts of Paris that are underwater, like hidden caves. This would add an exciting new dimension to her adventures as Ladybug and also her relationship with Adrien. Maybe she has to keep her mermaid identity a secret from him at first, which would create some interesting drama.
Some fanfictions focus on the mermaid - like powers of the characters. For example, they might have the ability to control water currents or create underwater illusions. This power exploration often ties into the overall plot as they use these powers to overcome challenges. Another popular theme is the clash between the land - based superhero world and the underwater mermaid world. How the characters adapt to this new environment and the cultural differences between the two worlds is an interesting aspect that many fanfictions explore.
Let's say that the Kwamis have some sort of connection to the magic in the ocean. Tikki could have the power to grant Ariel temporary powers on land similar to how she gives Marinette her powers. And Plagg could befriend Sebastian the crab and together they cause some comical chaos while also helping to protect the underwater realm from threats. The characters of Miraculous Ladybug could bring their own unique powers and personalities to the story of The Little Mermaid, adding new layers of adventure and friendship.
A common trope is the 'underwater adventure' trope. The fanfiction often takes Marinette on exciting adventures underwater. She might explore lost underwater cities, find hidden treasures, or encounter ancient sea monsters. This allows for a lot of world - building and showcases the beauty and danger of the underwater world. Also, the 'fish - out - of - water' (pun intended) trope is used when Marinette has to adjust to her new mermaid form and the underwater lifestyle.
First, do your research on mermaid lore. Know about their habitats, powers, and common characteristics. Then, think about how to blend the Miraculous Ladybug universe with the mermaid concept. For example, how would the Miraculous work underwater? Next, create an interesting plot. Maybe have Ladybug and Chat Noir discover an underwater civilization of mermaids that is in danger. Also, develop your characters well. If they transform into mermaids, how does that change their personalities? And don't forget to add some action and drama to keep the readers engaged.
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.
I'm sorry, but the information provided by the given paragraph does not include the two novels, The Mermaid Effect and The Desaro Mermaid. I can recommend you other mermaid romance novels, such as "Young Master Li, Your Wife's Tail Loses","His Mermaid Lady Loves Candies","The Mermaid Baby in the Galaxy", and so on. I hope you like my recommendation. Muah ~
Ursula as a mermaid in fanfiction might also explore her backstory more deeply. She could have been a mermaid princess in a far - off part of the ocean. But due to a power struggle or a curse, she lost her status and became the villain we know. This could add a lot of depth to her character and make the fanfiction really engaging.
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.