Well, in some fanfictions, she might be depicted as the devil through her actions. Maybe she's shown as being manipulative, using her charm to get what she wants from others, much like how the devil is often portrayed as a tempter in traditional stories.
One reason could be to explore a different side of Bella Swan. Writers might want to break away from the typical good - girl image of her and see how she would function as a more villainous character. It adds a new dimension to the story.
She might be portrayed as a villain by showing her being manipulative. For example, she could use her relationship with other characters to get what she wants, like using Edward's love for her to control his actions or decisions.
It might not be as widely popular as some mainstream fanfic concepts. There are so many different fanfic ideas out there, and this one is rather niche. It depends on the specific fanfic community. For example, in the Twilight fandom, most fanfics revolve around the original vampire - human love story or its variations, so this devil - related concept may attract only a small subset of fans who are interested in darker and more out - of - the - box interpretations.
Well, it depends on the specific fanfiction. There are countless fanfictions out there, and while some may indeed portray Bella Swan as a Winchester, others may not. Fanfiction is a very diverse genre where authors can take characters and bend the rules to fit their own unique stories. So, without specifying a particular fanfic, it's hard to say for sure.
There probably is. Fanfiction writers are very creative and love to cross over different fandoms. Bella Swan's story has elements like love and the supernatural, and the Addams Family has a very distinct and interesting set of characters. Combining them in a fanfiction can lead to some really unique and engaging stories. Maybe it could be about Bella Swan somehow getting involved with the Addams Family's strange and wonderful world.
In this fanfiction, Bella Swan as Hecate could be depicted as a very wise and mysterious figure. She may use her knowledge and powers to protect those around her. Just like Hecate is often associated with crossroads, Bella might be in a position to make important decisions for the characters in the story. She could also have the power to transform things or people, which is a characteristic often linked to Hecate.
Power could be a motive. She might want to have control over the vampire world or the humans in Forks. So she starts doing villainous things to gain that power.
Well, a plotline could involve Bella being hunted by some sort of demon hunters who sense her devilish origin. Meanwhile, she tries to understand why her father was involved in hiding her true identity all this time. She could also have an internal struggle between the good in her, which was influenced by her human upbringing, and the evil tendencies that come with being the devil's daughter. There might be a prophecy about her that she has to either fulfill or fight against, and this could be intertwined with the Twilight universe's existing supernatural elements.
In some fanfictions, Bella's character might become more confident. As an immortal, she no longer has the same fears of mortality. For example, she could be more fearless in facing dangerous situations.