There could be. A lot of fan - fic writers like to create crossovers between different universes. Elsa from 'Frozen', the Creeper from Minecraft and Spiderman are all very popular characters, so it's possible that someone has written a story involving them. However, it might not be very common given how different their worlds are.
In a 'anna elsa x mother fanfic', the mother could be a central figure in resolving the conflicts between Anna and Elsa. Maybe she was lost long ago, but through some magical means, she comes back in a form to guide them. This could add a new layer of emotional depth to their story, as they deal with both the joy of having their mother back and the challenges of following her advice in a world that has changed since she was last there.
For Percy, his loyalty and sense of adventure can be emphasized. He could be the one to initiate contact with Elsa, seeing her as a new and exciting mystery. His skills in combat and his ability to think on his feet would come in handy when they face challenges together. For Elsa, her growth from a withdrawn and fearful queen to someone more open and trusting can be shown. Meeting Percy, who is so different from the people in her world, could be a catalyst for this change.
Harry Potter himself would be likely to interact with Elsa. Given his own experiences with unique powers and his role as a hero, he would be sympathetic to Elsa's situation. They could bond over their shared sense of responsibility and their ability to do things that others can't. Harry could also introduce Elsa to his friends and the world of Hogwarts.
One common theme is the power struggle. Since both Elsa and Pitch have strong and distinct powers, many fanfictions explore how they deal with each other's powers. For example, Elsa's ice powers might be a counter to Pitch's nightmares or vice versa.
Yes, there are some. You can start by looking on fanfiction websites like Archive of Our Own. Just search for 'elsa x olaf fanfic' and you'll find various stories written by fans.
One common theme is self - discovery. The OC often helps Elsa to further understand herself and her powers. Another theme is friendship. They start as strangers and develop a deep bond. For example, in many stories, the OC might be the first person to truly accept Elsa for who she is.
It's not ethical at all. Such fanfiction often involves taking a character from a children - oriented story like Frozen and turning it into something with adult - themed content. This not only disrespects the original creators and the target audience of the original work but also sets a bad example in the fan community. Fanfiction should be about enhancing the story world in a positive and respectful way, not introducing inappropriate elements.
One possible plot could be that Naruto, while on a strange mission, gets transported to Elsa's world. Naruto, being his adventurous self, tries to understand Elsa's powers and her fear of them. He might encourage her to face her fears in a more direct way, like he does with his own challenges in the ninja world. And they could team up to protect Elsa's kingdom from some unknown threat.