Anna, being outgoing and adventurous, would probably get along great with Chat Noir. They could have a lot of fun banter and adventures together. When it comes to Elsa and Hawk Moth, Elsa's coldness (in personality as well as power) would be a contrast to Hawk Moth's manipulative and power - hungry nature. She would be very resistant to his attempts to use her for his evil plans.
Obviously, Ladybug and Chat Noir are the heroes in the Miraculous world, so they would be main characters. In Frozen, Elsa and Anna are the key figures. However, we might also see other characters like Tikki and Plagg from Miraculous having some interactions with the Frozen characters. For example, Tikki might be fascinated by Elsa's ice powers and try to understand how they work compared to the Miraculous powers.
One possible plot could be that Ladybug and Chat Noir are transported to the world of Frozen. There, they meet Elsa and Anna. Maybe they team up to fight a new villain that is causing chaos in both the Miraculous and Frozen universes. For example, a villain might be using the power of the Miraculous to freeze parts of Paris and also trying to take over Arendelle.
When it comes to how the characters' personalities change in this crossover, it's quite complex. Marinette, as Ladybug, may start to show a more vulnerable side. The beauty and danger of the Swan Lake world make her realize that she can't always be in control. Chat Noir might become more solemn. The grandeur and the dark undertones of Swan Lake could make him more aware of the seriousness of their situation. And for other characters like Chloe, she could either be completely out of her depth and become more submissive or, in a twist, she could try to take on the role of a villain within the Swan Lake story, using her mean - girl tactics in a different, more magical context.
Marinette is shy and often nervous, while Alya is bold and outgoing. Their personalities can create a great dynamic. Alya can encourage Marinette to be more confident and take risks. For example, when Marinette is hesitant to enter a fashion competition, Alya pushes her to do it.
Another plot could involve Anna getting a Miraculous. She could be a new hero in Paris, teaming up with Ladybug and Chat Noir. They might face a villain who has the ability to create eternal winter like in Frozen, and Anna's experience with dealing with Elsa's winter could come in handy. Also, the cultural differences between Arendelle and Paris could add some interesting twists to the story.
Spiderman would likely be initially cautious when meeting Ladybug. He's used to operating on his own in New York, and suddenly meeting a hero from Paris with a very different power set would be a bit of a shock. He might be impressed by her ability to create objects with her yo - yo and use them in combat.
For Chat Noir, if he's the one sleeping in the fanfiction, we could see how Ladybug reacts to his vulnerable state. This can show her caring side. And Chat Noir's dreams could also be used to explore his past or his desires. If he dreams of a world without Hawk Moth and he can be with Ladybug freely, it shows his longing for a normal life and his love for Ladybug. The way he behaves in his sleep, like murmuring Ladybug's name, can also give insights into his passionate and somewhat impulsive personality.
Marinette might become more confident if she's reborn. In the original, she's often shy and clumsy, but in a reborn scenario, she could use her past experiences to be more assertive. For example, she might not stutter as much around Adrien. Adrien, on the other hand, could become more carefree if reborn. He's usually burdened by his family life, but a new start could make him more open to having fun. Chat Noir might also show a different side, perhaps being more strategic instead of just going in head - first all the time.
Ladybug could use her agility and strategic thinking to work with Pokemon in battles. For example, she could direct a Pikachu's electric attacks against an enemy. Chat Noir might bond with a feline - like Pokemon like Meowth and they could combine their cat - like skills. Alya could be a Pokemon journalist in the fanfiction, reporting on new Pokemon sightings in Paris which are actually related to the Miraculous powers.
Well, Peter Parker might be really curious about Ladybug's powers. He'd probably ask her a lot of questions about how her Miraculous works. Ladybug, on the other hand, would be interested in Spider - Man's scientific gadgets. They could exchange knowledge and techniques.