A common plot could be revenge. If they start hating each other, one or both of them might seek revenge. For instance, Bella could try to expose Edward's vampire secrets to the human world as a way to get back at him. Another plot is competition. They could be competing for something, like a powerful vampire artifact or the love of another character, which makes them rivals and fills them with hatred.
One common theme is misunderstanding. For instance, they might misinterpret each other's actions or words, leading to the growth of hatred. Another theme could be jealousy. If there is a new character involved, either of them could become jealous and that could turn into hatred.
Well, in fanfiction, anything can happen. Maybe a writer decides to explore a different side of their relationship. It could be due to a misunderstanding that spirals out of control. For example, Edward might misinterpret Bella's actions as being self - centered or manipulative, and Bella could see Edward as overbearing and controlling. This would completely change the dynamic from the original love - story in Twilight.
One fanfic could be 'The Rift between Bella and Edward'. In this, their mutual hatred stems from a misunderstanding about Bella's future plans and Edward's overprotectiveness. Another might be 'Bella and Edward: Enemies at Last' where a new vampire in town creates jealousy and animosity between them.
One way is through the use of humor. For example, they could constantly try to one - up each other in ridiculous ways, like Edward changing all the books in the library to face the wrong way just to annoy Bella who loves order in the library. Another interesting development could be through the introduction of a common enemy. They might be forced to put aside their hatred when a bigger threat, like a new vampire or a bully in school, emerges. They gradually realize that they are not so different after all while fighting this common foe.
Another reason could be the influence of other characters. There might be a new character in the fanfiction who convinces Bella that Edward is not who she thought he was. This new character could plant seeds of doubt in Bella's mind about Edward's intentions and actions, ultimately resulting in her hatred.
They might tease each other through their words. For example, Edward could use his knowledge of Bella's thoughts (in some fanfics where he still has that ability) to make little remarks that make Bella blush or get flustered.
One common theme is the struggle between their two different worlds. The vampire world Edward belongs to and Bella's human world. This difference can lead to both love and hate. Another theme is the power dynamics. Edward is physically stronger and has more 'power' in some ways, which can cause friction and a love - hate relationship.
Well, in a lot of fanfiction, the love - hate relationship between Bella and Edward is a great tool for plot development. It can introduce conflicts like jealousy or differences in long - term goals. For instance, Bella might want a more normal life at times and see Edward's vampire world as a hindrance, which causes 'hate'. But their underlying love always pulls them back together, creating a roller - coaster of emotions for the readers.
One possible plotline could be that they are forced to work together on a school project despite their hatred. As they interact, they start to discover things about each other that they didn't like before but now see in a new light. Another could be that they are competing for the same thing, like a scholarship or a lead role in a play, and their hatred fuels their competitiveness. A third plotline might be that they are neighbors and keep getting into petty arguments over things like noise or property boundaries, which gradually escalates their mutual dislike.