The plot could start with the reader being in a place where Jack Frost has just caused some sort of chaos with his ice. The reader decides to confront him. Jack is a bit taken aback by the reader's boldness. As the fight begins, Jack tries to use his powers to intimidate the reader. But the reader is not easily scared. They keep coming at Jack, which makes Jack realize that this human is different. Eventually, they might find out that they are both fighting for something similar, like protecting a certain place or person, and the fight could turn into an alliance.
Well, in a fight between Jack Frost and the reader, it could start with a misunderstanding. Maybe the reader mistakes Jack's icy pranks for something malicious. Jack, being the spirit of winter, might initially be defensive. He could use his ice powers to create barriers or send sharp icicles towards the reader. But if the reader has some hidden power or just pure determination, they might be able to dodge and counter with their own unique skills. It could be a really intense battle where the environment around them turns into a frozen and chaotic scene.
One common theme is the discovery of magic. The reader often enters Jack Frost's world which is full of winter magic, and they explore it together. For example, in many fics, they might discover a hidden ice cave filled with magical ice crystals.
One popular 'jack frost x reader fanfic' is 'Frosty Encounters'. It has a really engaging plot where the reader character gets caught up in Jack Frost's wintry world. The author does a great job of building a relationship between the two characters.
Another theme is the power of love and acceptance. The male reader accepts Jack Frost for who he is, a magical being, and Jack Frost accepts the reader despite the reader being from the human world. This mutual acceptance creates a strong bond between them, and in some fanfics, this love and acceptance are what save them from various challenges.
They could start by just listening to each other. Jack could take a moment to understand how the reader feels about his actions, and the reader could try to understand Jack's nature as a winter spirit. Just by having an open conversation, they might be able to find common ground.
One possible reason could be a misunderstanding about Jack's duties as the spirit of winter. Maybe the reader expects him to be around more often, but he has to spread winter across the world. Another reason might be jealousy. If the reader sees Jack being friendly with other beings, they could get jealous and start an argument.
Well, in a 'jack frost x merida fanfic', the settings can also be quite diverse. It could be set in a wintry landscape that Jack Frost is familiar with, or in the Scottish highlands where Merida hails from. The story might revolve around Jack Frost teaching Merida some of his ice - related magic, or Merida showing Jack Frost how to be more in touch with his emotions. There are so many possibilities for character development, plot twists, and world - building in such a fanfic.
Another one to check out is 'A Winter Bond'. It focuses on the emotional connection between Jack Frost and the male reader. The author does an excellent job of describing their feelings and the tender moments they share, especially during the winter nights.
I'm not sure if there is an existing 'jack frost x elsa pregnant fanfic' specifically. There are a vast number of fanfics out there in the fandom world, and it might exist, but it's not something that I can confirm with certainty. You could try searching on some major fanfic websites to see if you can find one.