In a fanfiction, Marinette might sing as a way to communicate with a magical creature in the Miraculous Ladybug universe. The creature only understands the language of music. So, Marinette has to sing her thoughts and feelings. This could lead to her discovering a new power or a hidden place. Her friends might be initially confused but then support her in this strange new adventure that her singing has led her into.
Perhaps Marinette sings a lullaby in a fanfiction. She sings it to a young child who was affected by an akuma attack. This act of kindness and her beautiful voice could attract the admiration of Chat Noir. And from there, a new friendship or a deeper connection between them could start to develop. Also, it could inspire other characters in the story to be more kind and helpful.
One possible plot could be that Marinette enters a singing competition. She is super nervous at first, but as she starts singing, she gains confidence. Her song could be about her journey as Ladybug, without revealing her identity of course. And her performance might attract the attention of a new villain who wants to use her voice for their evil plans.
The plot could involve Marinette trying to hide her new flying ability from everyone at first. She might be afraid of how others will react or that Hawk Moth will find out and target her more. So she practices in secret, which leads to some comical moments like almost getting caught by Tikki.
They could be paired up for a hero - training exercise. Since Marinette is Ladybug and Chloe has been Queen Bee in the past. They have to learn to work as a team. This forces them to put aside their differences. They might start to see each other in a new light. For instance, Marinette could learn that Chloe has a lot of knowledge about Parisian high society that could be useful in fighting villains. And Chloe could see Marinette's strategic thinking as Ladybug.
She could have been kidnapped by a new villain who wants to use her skills as a fashion designer for some evil purpose. Since Marinette is so talented, this villain might think she can create special costumes or items for their evil plans.
The plot could involve Marinette discovering an ancient spell that creates the armor. She has to figure out how to control it at first. For example, she might accidentally blast something when she tries to use its power for the first time.
She could be in the hospital because of a bad fall during a chase in her Ladybug form. Her classmates might start a fundraising campaign to help with her medical bills. And Chat Noir could be secretly visiting her at night, leaving little gifts by her bedside.
In this fanfiction, Marinette and Tikki could be transported to an alternate version of Paris. Here, everything is different, and they have to find a way back. Marinette uses her wits and Tikki's knowledge to navigate this strange new world. They meet different versions of their friends and enemies, and through their adventures, they learn more about themselves and their relationship.
Perhaps there's a beach fashion show in the fanfiction. Marinette enters wearing her bikini and wows everyone with her unique style. It could also be a moment where she catches the eye of Adrien, who is there to support his friends in the show.
One interesting plot could be that Marinette - as - Kwami is accidentally discovered by Hawk Moth. He tries to capture her to use her powers for his evil plans. Marinette then has to use her wits and any new Kwami - like abilities she has to escape and warn Ladybug (who she can't transform into at the moment). This would create a lot of tension and action in the fanfiction. Also, it could explore how Marinette feels being in such a vulnerable state.
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.
There's also 'The Luka - Marinette Connection'. In this fanfiction, the connection between Luka and Marinette is explored on a deeper level. It starts with Luka noticing Marinette's little quirks and how she tries to hide her feelings. As the story progresses, they start to open up to each other more. The author creates a really engaging story by adding in some mystery elements related to the Miraculous and how it might affect their relationship.