One common theme is the struggle between good and evil. Jane is often portrayed as more of the 'good' side trying to stop Jeff who is seen as the 'evil' one. So there's a constant battle of morals.
Another theme is redemption. Sometimes in fanfictions, Jeff is given a chance to redeem himself through his interactions with Jane. It shows that even a character like him can have a change of heart. Also, love or at least an attraction can be a theme. Even though they are enemies, there can be a sense of underlying attraction that develops between them over time which makes for an interesting dynamic.
The theme of identity is also prevalent. Both Jeff and Jane have their own identities that are often explored in fanfiction. For example, how Jeff became the killer he is and how Jane is trying to define herself in relation to Jeff. These themes add depth to the stories and make them more than just simple horror - themed tales about two killers.
Love - hate relationship is also very common. They are enemies by nature but in some fanfics, there's an underlying attraction or connection that they can't deny. This creates a lot of drama and tension in the stories.
One common theme is obsession. Nina is often depicted as being obsessed with Jeff, and this plays a big role in their relationship dynamics within the fanfics. Another theme is the idea of two 'broken' characters finding some sort of connection. Since they are both killers, they have a shared darkness that can either pull them together or tear them apart.
One common theme is fear. Since Jeff the killer is a horror character, the fanfictions often play on the reader's fear of him. Another theme is the idea of an unlikely connection. For example, the reader might be drawn to Jeff's dark side in some way.
One common theme could be the exploration of their dark and twisted natures. Since both characters are from the horror genre, their fanfictions might focus on their evil deeds and how they interact in a world full of chaos.
One common theme is the exploration of the 'forbidden' or 'taboo' relationship. Since Jeff is a killer, a relationship with an OC is not something that would be considered normal or acceptable in mainstream society. Another theme is the idea of redemption. As mentioned before, the OC might be the catalyst for Jeff to change his ways. Fear and danger are also prevalent themes. The OC is constantly in a state of fear due to Jeff's nature, but at the same time, there is an allure because of his mystery and power.
The main characters are, of course, Jane the Killer and Jeff the Killer. Jane is often depicted as a vengeful figure, while Jeff is a well - known and terrifying killer. Their interactions are the focus of this fanfic.
One common theme is the power struggle. Since both Jeff and Nina are killers, there can be a battle for dominance in the fanfic. Also, the theme of unrequited love sometimes pops up, with Nina loving Jeff but not always getting the same in return. And of course, the general horror theme of blood and gore is often there as it's part of their nature as killers.
One interesting plot could be their unexpected alliance. Maybe they are forced to team up against a greater evil in the fanfic. This would create a lot of tension as they have their own issues with each other but have to put them aside for the common good.
Common themes in this fanfiction are the exploration of morality. Despite being killers, some fanfictions might question if they have any sense of right and wrong. The theme of identity also plays a role. They are not normal humans, so how do they see themselves? And finally, the theme of survival in a world that would hunt them down if it could. They have to constantly be on guard, and this can create interesting storylines within the fanfiction.
One common theme is the exploration of their dark natures. Since both characters are from horror - related backgrounds, fanfictions often show how their dark sides interact and either clash or find common ground.