In the fanfiction, Bella could be involved in a mystery within the orphanage. There might be a secret room or a strange event that keeps occurring, and she takes it upon herself to solve it, which could also lead to her finding out about her real family or some other important aspect of her past.
The caretaker of the orphanage could be an important character. They could be either very strict and cold, creating a difficult environment for Bella, or they could be warm - hearted and act as a parental figure to her.
A potential storyline could be that Bella discovers a hidden power within herself while living with them, and Klaus and Elijah have to protect her from other supernatural beings who are interested in her new - found power.
A really interesting storyline could be Bella trying to reconcile her old life in Forks with her new life as a Mikaelson. She might struggle with the differences in values and lifestyles. For example, the Mikaelsons are more into power plays and manipulation in the supernatural world, while Bella was used to the more straightforward (although still complex) relationships in 'Twilight'. This internal conflict could be a major part of the story, along with her trying to find her place within the Mikaelson family and the wider supernatural community.
One possible storyline could be that Bella discovers her Winchester heritage and has to learn how to hunt supernatural creatures like the rest of the family. She might struggle at first, but with the help of Sam and Dean, she becomes a skilled hunter.
One possible storyline could be that Hermione has lost her memory and ends up on the streets. She has to rely on her wits and some latent magic skills to survive. Maybe she befriends some muggles who are also homeless and they form an unlikely community, all while she gradually regains her memories and tries to find her way back to the wizarding world.
One possible storyline could be that Desmond has a hidden power that only he and a secret villain know about. The Avengers initially suspect him of being a threat, but as the story unfolds, they realize he's been trying to protect them all along. Another could be that Desmond is from a parallel universe and his presence in the Avengers' world starts causing glitches in the space - time continuum.
One possible storyline could be Bella's struggle to fit in with the Pierce Vampire community. She might face discrimination or challenges because she was originally a human associated with the Cullens. Another storyline could be her search for her true identity as a Pierce Vampire. Maybe she discovers she has a special role or prophecy associated with her new vampiric form. And she could also be involved in a power struggle within the Pierce Vampire hierarchy.
One possible storyline could be the challenges Bella and Edward face as they prepare for a new life together while dealing with the vampire - human relationship issues. Maybe they struggle to keep Bella safe during her pregnancy considering her human frailty.
Perhaps in the fanfiction, Bella could be in a situation where she tries to expose Edward's abusive behavior to the vampire community. This could lead to a complex web of relationships being affected as the vampires have their own set of rules and ethics regarding such behavior. And she may find some unexpected allies within the vampire world who help her get away from Edward.
In this fanfiction, the shield could be a gift from a god - like being. Bella then has to prove herself worthy of it. She could go on quests to strengthen the shield or unlock new abilities. And as she does so, she forms alliances and makes enemies, all while trying to keep the shield safe and use it for the greater good.