They can be portrayed as a destructive force. For instance, an Akuma - controlled character with ice powers could be freezing everything in sight, causing chaos in Paris. This makes it a huge threat for Ladybug and Chat Noir to handle.
Often, ice powers are shown as a unique ability that sets a character apart. In some fanfics, a new Miraculous is created that has ice powers. The wielder of this Miraculous has to learn to control the power, which can lead to some comical or tense moments as they accidentally freeze things or people around them.
In Miraculous Ladybug fanfiction, ice powers can add a whole new dimension. They might be given to a new character, perhaps a villain. For example, a character with ice powers could freeze Paris, creating a unique and challenging situation for Ladybug and Chat Noir to overcome. It could also be a power that a Miraculous holder temporarily gains, leading to interesting plot twists.
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.
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.
Ladybug's power of creation with the Lucky Charm could be enhanced by Spiderman's scientific knowledge. He might be able to analyze the Lucky Charm and figure out new ways to use it. For example, if the Lucky Charm is a simple object like a key, Spiderman could use his knowledge to turn it into a tool to unlock a special device that helps them in their fight.
Well, I've read a fanfiction where Ladybug got the power of elemental control. She could use fire, water, earth, and air to her advantage. For example, she could use water to put out fires caused by akumas or use air to create a shield. It made the battles more exciting and unpredictable. And in another one, she had the power of telepathy which helped her understand the akumas' motives better and communicate with her allies more effectively.
One interesting concept could be new combinations of the Miraculous powers. For example, a fanfic might explore what would happen if the Ladybug and Cat Miraculous were combined in a different way than we've seen in the show. Another concept could be the origin of the Miraculous powers being different, like they come from an ancient alien civilization instead of just being magic jewels. Also, some fanfictions might play with the idea of characters other than Marinette and Adrien getting the Miraculous and how they would use the powers.
New powers can greatly change the plot. If Ladybug has a new power like super speed, she can reach the akuma victims much faster, preventing them from being fully akumatized. This can shorten the battles and make the story more action - packed.
One way could be through the alien invasion itself. Maybe the aliens bring with them some sort of energy that interacts with the existing Miraculous. For example, the Ladybug and Cat Miraculous could gain new abilities like the power to create force fields to protect against alien attacks. Another option is that the Guardians discover ancient Miraculous that were hidden away for a reason and these new Miraculous are specifically designed to fight off extraterrestrial threats.
Maybe Hawk Moth himself decides to target the ice - skating community. He could akumatize a skating judge who then gives unfair scores to the skaters. Ladybug and Chat Noir would have to deal with this unjust situation and stop the akumatized judge from causing more chaos in the skating world.
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.