I really liked a fanfic where Elena and Kol time travel to the Middle Ages. It's a bit of a different take as they have to navigate the social norms of that time while also dealing with their own feelings. There are some really intense and romantic scenes in it. It shows how their characters develop in a new and challenging environment.
There's a fanfiction titled 'Through Time with Elena and Kol'. In this story, they accidentally time travel due to a spell gone wrong. They end up in various eras, from the Roaring Twenties to Ancient Rome. The story is filled with adventure as they try to find their way back home while also exploring their relationship in these different settings.
I've read 'Elena Through the Ages of Time Travel'. In this fanfiction, Elena's time travel is not just about going to the past but also to different possible futures. It's full of mystery and exploration as she tries to figure out how to get back to her original timeline while also learning important lessons about her own life.
The theme of power struggle often comes up. Kol is an original vampire with a lot of power, and Elena has her own agency. When they time travel, they might face situations where their powers are tested or they have to work together to gain power in a certain time period. This creates a lot of tension and interesting plot twists in the fanfiction.
They could develop a shared hobby. For instance, they both get into painting and use it as a way to express their emotions and connect on a deeper level. It would be unique because it shows a side of them that's not related to their supernatural natures.
In many 'The Vampire Diaries' Kol and Elena fanfictions, their relationship can be quite complex. Kol is often depicted as a wildcard, and his interactions with Elena can range from intense and dangerous to oddly alluring. Some fanfictions might explore a forbidden - love - type scenario, where Kol's vampiric nature and his family's history with Elena's friends create barriers. However, they also might find common ground in their mutual experiences of being caught up in the supernatural chaos of Mystic Falls.
The other vampire clans might be antagonists. They could see the baby as a threat to the vampire hierarchy or fear that the baby will have powers that could disrupt the balance among vampires. For example, the Originals' siblings who don't trust Kol might try to stop Elena from having the baby.
One possible plot could be that Kol kidnaps Elena to use her as bait for his enemies. He might think that by having Elena in his custody, her friends, especially the Salvatores, would come to rescue her and he could then ambush them. Another idea is that Kol has some sort of vendetta against Elena because of her connection to the doppelganger bloodline. So he kidnaps her to extract revenge on the entire line.
One common theme is forbidden love. Since Kol and Elena might be from different 'worlds' or groups within the show's lore, their relationship can be seen as something that goes against the norm. Another theme could be passion. The kiss is often a moment of intense passion that drives the story forward.
Another character that could be important is Elijah. He is often the voice of reason among the Originals. He might try to guide Kol in his relationship with Elena, or he could be against it if he thinks it will bring trouble to their family. So in this fanfiction, he could be a key figure in the development of the Kol - Elena relationship.
The plot might involve Kol falling in love with Elena. Kol, being the wildcard among the Originals, could try to win Elena over in his own unique way, which might create a lot of drama with the other characters like Damon and Stefan who are also interested in Elena.
One popular 'kol and elena fanfiction' might be those that explore their relationship in an alternate universe where they are on a journey together to discover a hidden magic. In these stories, Kol could be protecting Elena from various threats, adding an element of adventure.