Edward is the main character here. But then, the Volturi might be involved. If the wrong blame has something to do with vampire laws or politics, they could be the ones behind it or at least play a role in the situation. Jacob and his werewolf pack could also be part of the story. Maybe they get involved because of their relationship with the Cullens or because they suspect Edward has done something wrong at first but then realize it's a false blame. And of course, Bella, as she is always in the middle of things when it comes to Edward in the Twilight world.
Obviously, Edward himself is a central character as he is the one being wrongly blamed. Bella would also be involved as she is closely associated with Edward in the Twilight series. His vampire family, such as Alice, Jasper, Emmett, Rosalie, Carlisle and Esme, would likely be part of the story too. They would either be trying to help him clear his name or be affected by the false blame in some way.
Well, often in such fanfiction, a theme is the re - evaluation of relationships. When Edward is wrongly blamed, it shakes the relationships he has with other characters like Bella. His friends may also be divided in their loyalty. There could also be a theme of justice, as Edward tries to seek it and clear his name. The fanfiction might explore how the Twilight world's own rules and norms play into this situation of false blame.
In some Twilight fanfiction, Edward might be blamed because of his over - protective nature. He often makes decisions for Bella without fully considering her own desires, which can be seen as controlling and thus draw blame.
A common scenario is when Bella gets into danger because of Edward's vampire - related enemies. Since he's a vampire, he has foes, and they often target Bella to get to him. In fanfiction, this can lead to Edward being blamed for bringing this danger into Bella's life.
The Princesses, Celestia and Luna, are likely to be part of it. They might be the ones with the knowledge or power to help Twilight. Celestia could offer her wisdom on how to control this new and dangerous ability, while Luna might use her connection to the night and dreams to figure out if Twilight is under some sort of spell.
Obviously, Edward and Bella are the main characters as it's about their first child. Their child would be a major character too. And we can't forget the Cullen family. They would be very involved in the story, helping out with the baby and protecting the family.
Alice and Jasper could also be involved. Since they are both vampires and part of the Cullen family, an arranged marriage might be used to strengthen their bond within the coven or to establish some sort of connection with another vampire group. And Alice's visions could add an interesting twist to the story of an arranged marriage, as she might see the future implications of it.
Definitely Harry Potter himself. He's the central character in his own series, so it's likely he'd be involved in any crossover. Hermione Granger could also be a key character as she's smart and curious, and would be interested in learning about the 'Twilight' world. From 'Twilight', Edward Cullen is an obvious choice. His brooding nature and unique abilities would make for interesting interactions with the 'Harry Potter' characters. Also, Jacob Black could be involved, especially when it comes to the 'imprint' aspect as he has his own story arc related to that in 'Twilight'.
Well, Bella and Edward are almost certain to be involved. In Twilight, they are the central couple. In a fanfiction with this title, their relationship could be further explored, especially if something happened to Bella while she was sleeping that affected their bond.
One likely character could be a rival alchemist who is jealous of Edward's skills and reputation. Another might be a villain from the original story who has a grudge against Edward. Also, a new character created specifically for the fanfiction, like a power - hungry alchemist who thinks Edward can help him achieve his goals.
There's a chance that Scar could betray Edward in certain fanfiction concepts. Scar has his own motives and a complex past. If he feels that Edward is getting in the way of his revenge or his understanding of alchemy, he might betray him. Additionally, some fanfictions might explore the idea of an old acquaintance from Edward's childhood betraying him. Maybe someone who was once a friend but has since been corrupted by power or a dark influence. And then there's always the possibility of a new, mysterious character being introduced specifically to betray Edward for some yet - to - be - revealed reason.