In this fanfiction, Marshmallow could be a significant character. He's a large and somewhat intimidating snow creature created by Elsa. But with the baby on the way, he could become a gentle protector. He could stand guard outside their home to keep any potential threats away. Also, the trolls from the Frozen universe could play a role. They are wise and could offer their knowledge on how to take care of a baby with magical powers. They might even perform a special ceremony for the unborn baby.
In Jack and Elsa meet fanfiction, the authors usually explore the characters' personalities. Jack is often portrayed as a free - spirited and mischievous character, while Elsa is more reserved due to her past traumas. When they meet, they can learn from each other's experiences and grow. For example, Jack could teach Elsa to be more carefree, and Elsa could show Jack how to handle his powers more responsibly in some cases.
They can develop their relationship through their shared care for the baby. For example, when the baby is sick, Elsa uses her powers to keep it cool while Jack tries to cheer it up. This mutual effort in taking care of the baby can bring them closer.
Sure, there are numerous Jack meets Elsa fanfictions. In some, their encounter is a bit more of a friendly rivalry at first. Maybe they compete in a snow - building contest or something similar, and as they get to know each other better, they become friends and learn from each other's abilities and experiences.
One idea could be that Jack is the new student in high school and Elsa is the popular but reserved girl. They get paired for a science project and slowly discover they have a lot in common, like their love for winter and their insecurities. They start to bond over their shared experiences and develop a friendship that might turn into something more.
Well, it's possible that such a fanfiction exists. Elsa and Jack Frost are from different fictional universes (Elsa from Frozen and Jack Frost from Rise of the Guardians), but in the world of fanfiction, people often cross over characters and create all kinds of scenarios. However, I haven't personally come across a 'pregnant' fanfiction involving them. You might have to search on some dedicated fanfiction websites to find out for sure.
One common theme is family. It shows how Jack and Elsa form a family with their baby and all the love and care that comes with it. Another theme can be the combination of their powers in the baby. Their baby may have a unique blend of Jack's wintery powers and Elsa's ice powers.
There are many Elsa and Jack fanfictions that explore their relationship in different ways. Some might focus on how they would interact in modern - day settings. For example, they could be students in a school for magic users. Jack might be the popular, carefree guy and Elsa the more reserved, but powerful girl. Their relationship could start with a rivalry over who is the better magic user and then turn into a friendship and more.
Jack and Elsa are the central figures. Jack, with his mischievous yet kind nature, and Elsa, who has grown from a scared girl into a confident queen. In the fanfiction, they are the ones whose relationship is at the core, as they fall in love and get married.