Yes, there are likely some interesting fanfictions out there. Fanfiction often explores different aspects of the characters and their stories. It might expand on Anna Sackville - Bagg's adventures as a little vampire, perhaps her relationships with other characters in the original story, or it could create new scenarios for her to face.
Well, one possibility could be that Anna is turned into a vampire in a Frozen - themed fanfiction. Maybe she's bitten during one of her adventures in the Enchanted Forest. This could lead to a whole new set of challenges for her and Elsa. Anna would have to deal with her new vampire nature while still trying to maintain her relationship with her sister and the people of Arendelle.
Vampire Anna could be an outcast in the Frozen fanfiction universe. Since she's a vampire, she might be feared by the people of Arendelle who don't understand her new nature. But she could also use her abilities to help protect the kingdom in secret. For instance, she could use her enhanced senses to detect approaching threats.
In many 'Frozen Little Anna Fanfiction' stories, Olaf is quite popular too. His innocent and fun - loving nature can bring a lot of humor and light - heartedness to the story. He can be a great sidekick for Anna in her adventures, providing moral support or getting into comical situations. Sven, Kristoff's reindeer, can also make an appearance, especially in stories that involve traveling or exploring in the frozen landscapes of Arendelle.
Kristoff might also be a popular character in some fanfictions. He could be the one who helps Elsa and Anna on their adventures, providing his knowledge of the mountains and his loyalty. His relationship with Anna can also add an interesting dynamic to the story.
Obviously, Jeremy and Anna are the main characters as it's in their name. Jeremy is a human with connections to the supernatural world, and Anna was a vampire. Their ghosts in the fanfiction play important roles.
One interesting story could be where Jeremy and Anna go on a journey to find a way to bring back some of their lost friends. In this fanfiction, they might face many challenges and their relationship could grow stronger as they rely on each other.
One interesting plot could be Elsa and Anna going on a magical adventure outside of Arendelle. They might discover a hidden land filled with unique creatures and have to use their sisterly bond and powers to overcome challenges there.
Since I'm not familiar with the 'little anna story', it could be a story full of magic where little Anna discovers a hidden world. Or perhaps it's a story about how she overcomes difficulties at school or at home. There are so many possibilities.