One common theme is redemption. Given their dark and violent pasts, many fanfictions explore the idea of either Jeff or Jane seeking redemption through their relationship. Another theme is the power of love to change, as they are two very damaged individuals and love might be the thing that can transform them.
Jeff is a character who has a dark backstory that led him to become a killer. In the fanfiction, he is the object of Nina's affection. Nina, she's not just a sidekick. She has her own motives and actions. She might try to change Jeff or just be with him no matter what. Their relationship and their individual personalities are what drive most of the stories in this fanfiction.
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.
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.
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.
A different plotline could be set in an alternate universe where Jeff and Nina are not killers. They meet in a more normal setting, like a school or a small town. However, their dark pasts or tendencies start to surface, and they have to deal with how this affects their new - found relationship, all while trying to keep their true selves hidden from the people around them.
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.
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.
A 'Jeff the Killer x Masky Fanfic' could potentially explore a very dark and twisted relationship. It might involve their interactions within the creepy and often violent world they come from. Jeff the Killer is known for his brutal and deranged nature, while Masky has his own mysterious and somewhat menacing presence. The fanfic could be about them teaming up for some sinister purpose, or perhaps there could be a power struggle between them.