Marinette's flexibility can be shown through her physical actions. For instance, when she's in her Ladybug form, she can do high - jumps and acrobatic flips with ease, using her flexibility to dodge attacks. It can also be shown in her civilian life. When she's working on her fashion designs, she might be able to contort herself to get a better view of a piece she's working on or reach for a tool in a tight space.
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.
It could be portrayed as having more powerful abilities. For example, instead of just creating sentimonsters, it can also control the elements for a short time when a sentimonster is created. So if a sentimonster is made to look like a bird, it can also make the area around it windy like the bird is flying fast.
In some fanfictions, cataclysm is often depicted as an extremely powerful and dangerous ability. Writers may show how the character using it has to be very cautious not to cause too much destruction. For example, they might describe the internal struggle of the character when deciding whether to use cataclysm in a particular situation.
Marinette could start by gathering evidence of her own whereabouts at the time of the supposed crime. If she was at the bakery or with a friend, getting statements from those people would be a good first step.
In fanfiction, Marinette's strength can be seen in her leadership abilities. Even though she's young, she has to lead in battles against akumas. She makes quick decisions that often save the day. For example, she decides which strategy to use against a particular akuma, whether it's to attack head - on or find a more strategic approach.
Physically, Marinette's strength as Ladybug can be explored in fanfiction. She has to be in good shape to perform all those acrobatic moves while fighting akumas. Fanfictions might depict her training hard in her spare time to improve her physical strength. For instance, she could be shown doing parkour in the city at night to practice her agility and build up her leg muscles for those high jumps she often does during battles.
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.
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.