A witch who has come to Forks to study the unique energy there. She has her pink fluffy pencil case which is actually a container for her magic spells. In the Twilight fanfic, she gets intertwined with the vampire and werewolf drama because her spells start to interact with their powers.
It could be a new girl in Forks who just moved there. She has this pink fluffy pencil case that she got from her grandmother. And she gets involved in the Twilight world because of the strange things that start to happen with the pencil case.
One idea could be that the pink fluffy pencil case has some sort of magical property that gets involved in the Twilight world. Maybe it can protect the main character from vampires or werewolves. For example, when a vampire tries to attack, the pencil case glows and creates a shield.
Edward could also be the main character. He has his vampire senses which could help him analyze the bloody fingerprints in ways humans can't. He might be on a mission to protect Bella and the rest of his family from whatever danger the fingerprints signify. Maybe he suspects that it's a new threat from a nomadic vampire group and he has to use his skills to track them down.
Maybe it's a side character from the original Twilight books that the writer decides to give more depth to. Like one of the lesser - known vampires in the Volturi coven who has a secret past and motives that are explored in the fanfic.
Arya Stark from 'Fire and Ice' could be a great main character in a 'Fire and Ice Twilight Fanfic'. She has the skills of a trained assassin and a strong will. In the fanfic, she could find herself in the world of 'Twilight' and use her skills to navigate the dangerous world of vampires and werewolves. Maybe she would form an alliance with the Cullens or the werewolf pack and help them in their battles.
It could be Eraser. Since Pen and Pencil are the main characters, Eraser might be jealous of their new - found friendship or relationship. Eraser could try to break them apart by causing misunderstandings or directly interfering in their tasks and challenges within the BFDI world.
It could be a woman who was once an ordinary Twilight fan but then became a trophy wife. So she brings her Twilight obsession into her new life. She might be someone who is constantly trying to balance her love for Twilight with her new - found status as a trophy wife. For instance, she may try to incorporate Twilight - related items or themes into her luxurious lifestyle.
There's also a possibility that it could be a self - insert of the author. In this case, the author imagines themselves living in the Twilight world and having the ability to redo certain situations, which would make them the main character driving the new narrative in this fanfic.
Maybe it's Bella. In this fanfic, the focus could be on Bella's relationship with the 'brown - eyed beauty' and how they interact. They could become best friends or rivals.
It could be Ana, the main character from 'Real Women Have Curves'. Imagine her being transported into the 'Twilight' world and having to deal with vampires and werewolves while still holding on to her strong - willed and body - positive self.
It could be someone completely new. A character that the author creates to disrupt the status quo in the Twilight universe. This new character might have unique powers or abilities that change the course of the story.