It could be that some of the humans who have discovered the existence of vampires and the new baby become antagonists. They might form a group to hunt down the Cullens and the baby, fearing that the baby could be the start of a new vampire - human hybrid race that could overpower humans.
Well, perhaps the plot could involve the challenges of raising a new baby in the world of vampires and humans. Maybe the new baby has some special powers that attract both danger and allies. They would have to protect the baby from the Volturi who might see the new addition as a threat to the vampire - human balance.
Well, perhaps the story could focus on how Bella and Edward adjust to having another child. They already had Renesmee, and now with a new baby, there are more family dynamics to explore. For example, Renesmee could be a protective older sister, and the family might have to deal with the jealousy or over - protectiveness that can come with a new addition to the family.
The Volturi could be the villains again. Since they were so concerned about Renesmee, they might be even more worried about a new half - vampire - half - human baby. They could see it as a threat to their power and their rules about vampires and hybrids.
Obviously, Edward and Bella are the main characters. They are the parents in this fanfiction. And of course, their baby is also a very important character, even though it may not have a name yet in some versions of the fanfiction.
The plot might revolve around how Edward and Bella adjust to being parents. They could face challenges like normal parents, such as the baby not sleeping through the night. But also, they have to deal with the fact that their baby is half - vampire and half - human. For example, they might need to figure out what kind of diet the baby should have as it grows. And they may worry about how the baby will fit into both the human and vampire worlds.
I'm not aware of any official 'Edward Kills Bella' baby fanfiction. In the original 'Twilight' series, their relationship is complex but not of this extreme nature. Fanfiction can vary widely in themes, but this seems like a very dark and uncharacteristic take compared to the source material.
The baby would also be a significant character, even if it might start as a newborn. Its presence changes the dynamic between Bella and Edward and influences the actions and decisions they make throughout the fanfiction. And depending on the plot, other characters like Jacob or members of the Cullen family could also play important roles. For example, Carlisle might be involved in providing medical knowledge about the unique situation of the baby. Or Jacob could be there to offer protection from the werewolf side, given his connection to Bella and his pack's loyalty.
Well, it could be about how Bella and Edward adjust to parenthood. Bella might struggle with her new role as a mother while still being a new vampire. Edward, on the other hand, could be overly protective. Their relationship might also change as they focus more on their baby's needs.
One popular theme is the challenges they face as new parents. For example, dealing with the baby's special abilities that might be inherited from their vampire - human union. Another theme could be the reactions of their families to the new baby. The Cullens might be excited but also worried about protecting the baby from the outside world.