Jeremy Gilbert is often portrayed as a complex character. He has a connection to the supernatural through his sister Elena. He can be brave, as he has faced many dangerous vampires. He's also intelligent, which helps him in his dealings with Klaus. Klaus, on the other hand, is a powerful and often feared original vampire. He's manipulative, using his charm and power to get what he wants. But deep down, he has a vulnerability due to his troubled past.
Maybe there's a plot where Klaus is cursed, and the only way to break it is through Jeremy's unique connection to the supernatural world. As they work together to break the curse, they start to understand each other's motives and past traumas. Their relationship deepens from initial distrust to a grudging respect and eventually something more romantic as they face various challenges and enemies along the way.
Love against all odds is a big theme. Since they come from different worlds, with Klaus being a dangerous and often villainous character in the main show, and Jeremy being more of an underdog. Their relationship in fanfiction often defies the expectations of those around them in the fictional universes. Also, the theme of self - discovery can be present, as they both might learn more about themselves through their relationship with each other.
I've heard that Tumblr can be a great place to discover jeremy x klaus fanfiction as well. There are often fic recs (fanfiction recommendations) posts where fans share their favorite stories about this pairing. You can also search Tumblr using relevant hashtags like #jeremyxklausfanfiction to unearth some hidden gems.
One common theme is the struggle of Jeremy dealing with the new responsibility. He might be worried about protecting the reader and the unborn child from the dangers in their world, especially if it's in the 'The Vampire Diaries' universe with all its supernatural threats.
You can start by looking on popular fanfiction platforms like Archive of Our Own (AO3). It has a large collection of fanfics, and you can use the search function to specifically look for 'Jeremy Gilbert x Pregnant Reader' fanfics. Another option is Fanfiction.net, although the interface might be a bit older. Just be sure to check the ratings and reviews to ensure the quality of the story.
One popular plotline could be Jeremy's struggle to control his newfound vampire powers. For example, he might have a hard time adjusting to his enhanced strength and speed, leading to some accidental chaos. Another could be his relationships with other vampires. Maybe he forms an unlikely alliance with an older, more experienced vampire who teaches him the ropes of the vampire world. And a third plotline might involve Jeremy trying to keep his vampire identity a secret from his friends and family, while still trying to protect them from the dangers of the vampire underworld.
Perhaps a plot where Jeremy uses his new vampire powers to protect Mystic Falls. He becomes a sort of vampire - hero. He could use his enhanced speed and strength to fight off other supernatural threats that the town faces, all while trying to come to terms with the fact that he's no longer human.
Jeremy's development as a vampire is also about self - discovery. He discovers new abilities that he didn't know he had. This makes him more confident in some ways, but also more cautious as he realizes the potential harm he could cause. He might start to explore the history of vampires, learning about their origins and the different clans. This knowledge gives him a new sense of identity. He is no longer just Jeremy Gilbert, the human. He is now part of a larger, more complex vampire world, and this new identity forces him to reevaluate who he is and what he wants to be.
At first, Elena might be shocked and a bit scared when she finds out. Their relationship could become strained as she has to adjust to the idea of her brother being a vampire. But over time, they could grow closer as Jeremy learns to control his vampire side and Elena sees that he's still the same person deep down.