One interesting fanfiction could be about Belle and Anna becoming best friends in the 'Once Upon a Time' universe. They might go on adventures together, helping each other out with their respective problems. For example, Belle could use her knowledge of books to assist Anna in understanding some ancient magic that she comes across.
A really cool fanfiction idea could be a time - travel story involving Belle and Anna. They could travel to different realms within the 'Once Upon a Time' world and meet various characters from different stories. Along the way, they discover secrets about their own pasts and futures, and this journey of self - discovery changes them in unexpected ways.
One idea could be that Belle and Anna, both orphans, meet in a magical forest. They discover they have a shared ability to communicate with forest spirits. Together, they embark on a journey to find a hidden library that is said to hold the secrets of their pasts. Along the way, they face challenges from an evil sorcerer who wants to stop them from reaching the library.
In some fanfictions, Anna and Kristoff might have a role reversal. For example, Kristoff could be the one in trouble and Anna has to be the strong one to save him. This would give a new perspective on their characters. Also, there could be a fanfiction where they are forced to live in a world without magic for a while. This would test how their relationship stands without the magic that is so prevalent in the 'Once Upon a Time' setting.
For Belle, emphasize her love for knowledge as an orphan. Maybe she was left with only a few books from her parents, and that sparked her thirst for learning. She could be shy at first but becomes more confident as she and Anna face challenges. For Anna, highlight her adventurous spirit which could be a result of growing up without parents and having to fend for herself. She's always eager to explore new things.
Elsa would be a great character to pair with them. Given her relationship with Anna in the original story, and her ice powers could add an interesting dynamic to any story with Belle. They could all work together to save a frozen kingdom or something similar.
Well, a great storyline might be Belle getting trapped in a different realm. In this realm, she has to use her wits and knowledge of magic (even if it's limited) to find a way back to Storybrooke. It could involve her meeting new and strange characters that are not part of the regular Once Upon a Time cast. Also, a story about Belle teaching the other residents of Storybrooke about the power of books and knowledge could be really engaging. After all, she has a deep love for books.
One idea could be that Elsa discovers a new, hidden power that she doesn't understand at first. This power has the ability to transport her and Anna to different realms. They end up in a realm where all the seasons are mixed up, and they have to work together to restore order. Another plot could involve a mysterious character from their past coming back and causing trouble in Arendelle. Anna tries to figure out the mystery while Elsa uses her powers to protect the kingdom.
One plot idea could be that Gaston has a change of heart after Belle rejects him. He starts to see the error of his ways and tries to become a better person. Maybe he helps Belle with some tasks in the village, gradually winning her respect if not her love.
One plot idea could be that Hook and Belle team up to find a lost magical artifact. They start off as reluctant partners, Hook being more of a scoundrel and Belle the book - loving intellectual. But as they face various challenges together, like fending off dark magic creatures and solving ancient riddles, they develop a mutual respect. Eventually, they discover that the artifact has the power to rewrite a part of their pasts they both regret.
In fanfiction about Belle's pregnancy, one common theme could be her fears and hopes. Given the often - dangerous world of Once Upon a Time, she might be worried about protecting the baby. Fanfic writers could also show how the other characters in the story react. For example, her friends might offer support and protection, while her enemies could see the baby as a potential threat or a means to an end.
One idea could be that Rumple and Belle go on a magical journey to find a lost artifact that can break a dark curse on their land. Along the way, they face various challenges that test their relationship and their individual strengths.