A new character could be introduced, perhaps a young girl who is inspired by Elsa and starts to worship her. This girl could then become Elsa's protege in a way, learning about magic and leadership from her. And as the story progresses, she could also help Elsa see the positive side of being worshiped.
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.
Another possible main character could be a futa named Nova. Nova is an inventor in her world and has created many amazing gadgets. When Elsa visits Nova's world by accident, Nova shows Elsa all her inventions. Their shared sense of wonder and Nova's intelligence make Elsa fall for her, leading to the idea of marriage in the fan fiction.
One idea could be that Elsa, after saving Arendelle multiple times, the people start to see her as a goddess - like figure. They build shrines in her honor and hold festivals dedicated to her. The plot could explore how Elsa deals with this new - found adoration, whether she feels uncomfortable or tries to use it to further help the kingdom.
The trolls could play an important role. They are mysterious and have their own magic. In dark Elsa fanfiction, they might be the ones who try to either contain Elsa's dark powers or guide her towards using them in a more positive way. Also, a new character could be introduced, like a powerful sorcerer from a far - off land who is either drawn to Elsa's powers or sees her as a threat and wants to eliminate her.
In some of these fanfictions, Sven could be a significant character. He might help Kristoff in his tasks related to Anna's pregnancy, like carrying supplies. Another character could be the trolls. They are known for their wisdom in the Frozen universe. So they could offer advice to Elsa and Anna about their pregnancies, such as how to deal with any magical complications or how to raise their children to be good and strong. And of course, the people of Arendelle are also important. Their reactions and support play a role in the story.
Kristoff is often involved. He would be there to support Anna, and might be a bit nervous about becoming a father. Olaf could also be a popular character in such fanfictions. He'd be his usual cheery self, trying to make the pregnant Anna and Elsa happy with his funny remarks.
Besides Anna and Elsa, there are many characters that play crucial roles. Hans is an important one at the start. He seems like a charming prince but later reveals his true, not - so - nice self. The people of Arendelle are important too. They are the ones affected by Elsa's powers and their reactions also shape the story. And the guards in the castle are there to protect the kingdom and are part of the overall story world.
Anna is crucial. She loves Elsa deeply and her love drives her to take risks and brave the cold to find Elsa. Kristoff, the ice harvester, is another important character. He has his own story and his relationship with Anna develops during their adventure. Olaf, the friendly snowman, is not only a product of Elsa's magic but also a symbol of innocence in the story. There is also Hans who at first seems like a good guy but later reveals his true, not - so - nice self.
Kristoff is often a popular character to include. Since he's Anna's love interest, his presence can add an element of romance and also his skills as an ice - harvester can be useful in different time - travel scenarios. Olaf is another great addition. His naivete and charm can provide some comic relief in tense time - traveling situations. Also, the trolls could be included. They have a lot of knowledge about magic and the past, so they could play a crucial role in guiding Elsa and Anna during their time travels.
Anna would be a likely candidate to rescue Elsa. She loves her sister deeply and has shown great courage in the past. She would stop at nothing to find and free Elsa from Hans.