One possible arc could be a mystery - solving one. Since Bonnie is often associated with the supernatural, Bella could get dragged into a mystery that Bonnie is trying to solve. Their cousin bond could be the key to unlocking secrets or finding clues.
Another arc could be about self - discovery. Bella, being in a new environment as Bonnie's cousin, could start to learn more about herself. She might discover new talents or aspects of her personality. And Bonnie could play a crucial role in this journey, either as a guide or as a mirror for Bella to see herself more clearly.
Well, in a 'bella is bonnie's cousin' fanfiction, there could be many interesting plotlines. For example, their relationship might bring about new dynamics in the story's world. Maybe they team up against a common enemy, or Bella's presence could change the way Bonnie approaches magic. It could also explore family bonds and how their cousin relationship affects the other characters around them.
There could be a theme of forbidden love. Not necessarily between Bella and Mats, but perhaps their cousin relationship could be a barrier to someone else's love interest. Or it could be a theme of redemption. Maybe one of them has made mistakes in the past, and the cousin relationship is a means to find redemption through family support.
One possible storyline could be that Annabeth uses her strategic skills to help Bella deal with the vampire and werewolf situation in Forks. Maybe she gives Bella advice on how to handle Edward's overprotectiveness or Jacob's pushiness.
Well, think about Harry and Jacob. They could bond over their shared protectiveness of Bella. Harry might be intrigued by Jacob's werewolf abilities and Jacob could be fascinated by Harry's magic. Also, Ron could have some really funny interactions with the Cullens. He might be a bit clumsy and out of place in their refined vampire world, but it would be entertaining to see how they all react to each other.
Well, in some fanfictions, the plot might revolve around family drama. Since they are cousins, there could be a feud within the family that they have to resolve. For example, an old family secret about a hidden inheritance that causes rifts among family members. Bella and Sookie could be the ones to uncover the truth and bring the family back together. They might use their unique perspectives, Bella with her knowledge of vampires in her own world and Sookie with her telepathy, to get to the bottom of things.
One common theme is family loyalty. Since they are cousins, the stories often revolve around how they support and protect each other within their family structure.
One great 'bella is caroline's cousin fanfiction' could be 'The Cousin Bond'. It explores their relationship in a unique way, showing how they support each other in the face of various challenges in their fictional world.
Another plotline could be that they are both in danger because of their family connection. Some evil force wants to use their relationship to gain power or access to something important. So they have to go on the run together, learning to rely on each other and their unique skills along the way. Maybe Percy has some magical abilities that Jacob doesn't, and vice versa, and they have to use these skills to outwit their pursuers.
A possible plotline could be that they inherit a mysterious family heirloom. This heirloom has some sort of power or significance in both the wizarding and Muggle worlds. Harry and Jacob have to team up to figure out what it is and how to use or protect it. Another plotline could be that Jacob gets caught up in a wizarding conflict by accident just because of his relation to Harry. Harry then has to protect him while also teaching him enough about the wizarding world to keep him safe.
One good 'bella cousin x jacob fanfiction' could be 'Unexpected Bonds'. It explores the unique relationship between Bella's cousin and Jacob in a really interesting way, with lots of emotional depth.