Perhaps there's a new character in the fanfiction who has a vendetta against Marinette. This character could have set her up, making up false accusations and getting her arrested. This would create a lot of drama and give the other characters a chance to show their loyalty to Marinette as they try to prove her innocence.
It could also be that Hawk Moth has a new scheme. He might have manipulated the situation to make it look like Marinette is a threat. He could have planted false evidence or used an Akuma to make someone accuse her, all in an attempt to get to Ladybug.
A simple reason for Marinette's depression could be the stress of her double life. Juggling school, friends, and being Ladybug is just too much for her, so she gets depressed.
There are many interesting aspects in fanfictions regarding Marinette's armor in Miraculous Ladybug. One possibility could be that the armor gives her enhanced powers, like being more resistant to akuma attacks. Maybe it has special designs that are related to her Ladybug identity, with red and black patterns that are more intricate than her normal suit.
One possibility could be that in the fanfiction, all of Marinette's friends plan a huge surprise party for her. They decorate her room with pink and white balloons, her favorite colors. Alya might be in charge of inviting everyone secretly, while Adrien brings a special, handmade gift that he's been working on for weeks, showing his deep affection for Marinette in a way that's still in - character for the show.
Marinette's character can be developed through her angry outbursts. For instance, when she gets angry, we might see her make rash decisions that she later regrets. This shows her impulsiveness when overcome by anger. Also, her anger could lead to her learning new ways to control her emotions, which is a part of her growth. Maybe she starts to practice meditation or some other calming techniques, which changes her character over time.
One possible fanfiction could be about Marinette transforming into a mouse - themed Miraculous holder. Maybe she discovers a new mouse - themed Miraculous in a hidden part of Paris. This could lead to her having new powers like super - speed and the ability to fit into small spaces. She could use these powers to outwit Hawk Moth's akumas in a really unique way, and her relationship with Adrien might also take an interesting turn as she tries to keep her new identity a secret from him.
In Miraculous Ladybug fanfiction, Marinette in a bikini could be part of a beach - themed story. Maybe she's on vacation with her friends. It could be a fun and light - hearted scenario where she shows off her confidence and style while enjoying the sun and sand.
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.
There are many fanfictions where Marinette sings. In some, her singing might be related to her expressing her feelings for Adrien. For example, she could sing a song she wrote herself about her secret love for him. It adds a creative and emotional aspect to the story.
One possible fanfiction could be about Marinette using her flexibility in a new way to design fashion. For example, she might create a line of clothing that is both stylish and allows for maximum movement, inspired by her own experiences as Ladybug. She could hold a fashion show where models are shown doing acrobatic stunts while wearing her designs, highlighting the flexibility aspect of the clothes.
There are many interesting fanfictions about Marinette and Luka. Some might focus on their relationship development outside of the superhero chaos. For example, a fanfiction could explore how they go on a simple date, sharing their interests like Marinette's fashion design and Luka's music.