There is this fanfic named 'Discovery of a Lifetime'. Marinette discovers that there is a parallel Miraculous world that is linked to her own. This discovery leads her on a journey to explore this new world and find out how it relates to her role as Ladybug. The story has a lot of world - building and Marinette's character development is really interesting throughout the story.
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.
One great fanfiction could be about Marinette getting the Peacock Miraculous in a unique situation. For example, in a world where all the Miraculouses are scrambled among the characters, Marinette discovers the Peacock Miraculous while on a solo adventure. She has to figure out how to use its powers, which are different from the Ladybug Miraculous she's used to. This could lead to some really interesting character development as she tries to master a new set of abilities.
I really like 'The Hidden Bond'. In this fanfiction, Marinette discovers a new side to Cat Noir that she hadn't seen before. It's full of cute moments and some really well - written dialogue. It also has an interesting plot that keeps you hooked from start to finish.
A fanfiction titled 'Marinette's Eye - Opener' is also quite good. Here, Marinette finds out about a different side of Chat Noir that she never knew before. It changes their relationship dynamics and makes for a very engaging story. The author does a great job of exploring Marinette's emotions as she comes to terms with this new discovery.
One idea could be that Adrien initially feels shocked but also a sense of relief. He might have always had a feeling that Marinette was special, and now it all makes sense. So he starts to view her in a whole new light, with more respect and admiration for her dual identity.
There's also 'Marinette's Hidden Talents'. In this fanfic, Adrien discovers some unique skills that Marinette has been hiding. It's a really interesting take as it builds on their characters and the bond between them. It has a lot of cute moments and a bit of mystery too.
One great Marinette x OC fanfiction is 'A New Hero in Paris'. In this story, the OC has a unique power that complements Marinette's Ladybug abilities. The interactions between them are really well - written, starting from initial misunderstandings to a deep friendship and potential for more. It shows how the OC fits into the Miraculous Ladybug world and the challenges they face together.
One great fanfiction could be 'Marinette's Unbound Locks' where she lets her hair down during a special moment at a school dance. It beautifully describes how her long hair frames her face and adds to her charm as she shares a dance with Adrien.
A lot of these fanfictions focus on the relationship between Marinette and Adrien. For example, in some, Adrien is overjoyed when he finds out about the pregnancy and they start planning their future together. It's sweet to read how their love grows even stronger in the face of this new development.
One possible scenario could be that Marinette gets injured during a fight as Ladybug and is rushed to the hospital. In the fanfiction, her friends might come to visit her, and there could be some sweet moments between her and Adrien as he's worried about her. Maybe she has to keep her identity a secret even while in the hospital, which adds an extra layer of tension.