Perhaps Elena is sent to New Orleans by her friends to seek a cure for a new vampire - related ailment. Klaus, who still has an interest in Elena, offers his help but on his own terms. They end up in a power struggle within the vampire community of New Orleans. As they interact more, Elena starts to see a different side of Klaus, a side that is not just the cruel and power - hungry vampire she thought he was. This new perspective makes her question her own feelings towards him.
One idea could be that Elena discovers she's pregnant and tries to keep it a secret from Klaus at first. But as the pregnancy progresses, she realizes she needs his help. Another could be that Klaus is initially angry but then becomes protective. Maybe there are threats from other supernatural beings because of the baby's unique heritage.
One plot idea could be that Elena and Klaus, as humans, meet in a small town where they both start over. They initially dislike each other but then find out they have a shared love for art. They start collaborating on a community art project and slowly fall in love.
One idea could be that Klaus and Elena meet in an art class. They start off as rivals, constantly competing for the top spot in the class. But as they get to know each other's backstories, they begin to understand each other better and develop feelings. For example, Elena could learn about Klaus's difficult family life which made him so competitive, and Klaus could see Elena's passion for art which was inspired by her late parents. This could lead to a slow - burn romance.
Well, a possible plot is that Elena's pregnancy is the result of a spell gone wrong. Klaus, despite his initial shock, decides to stand by her. This could lead to a series of events where they have to fight off those who see the baby as a threat. It could also explore how Elena deals with the physical and emotional changes of pregnancy while being in a rather strange relationship with Klaus. And the baby might have some unique abilities that are both a blessing and a curse.
Their relationship could develop through shared danger. For example, if they are both targeted by a powerful witch in New Orleans. They would have to rely on each other for survival, and this mutual dependence might lead to a grudging respect. Then, over time, that respect could turn into something more like friendship or even a deeper attraction.
One idea could be Percy discovers an ancient underwater temple in the Mississippi River near New Orleans that's related to a long - forgotten sea god. Another could be he teams up with local demigods in New Orleans to fight off a group of malevolent spirits that are causing chaos in the city. Maybe he also has to navigate the complex social hierarchies among the different magical beings in New Orleans while on a quest.
Another possible plot is that Elena, while initially afraid of Klaus, starts to learn about his complex personality through a series of encounters. As a result, she begins to question her own beliefs about good and evil in the vampire world, and this creates a lot of tension and character development within the fanfiction.
A really interesting plot could be that Elena and Mateo get transported to a different realm. In this realm, their powers work differently and they have to learn how to adapt and work together to find a way back home. They meet new allies and enemies in this strange new world and their relationship deepens as they rely on each other for survival.
One idea could be that Klaus, after being away for a long time, returns to Mystic Falls and finds Elena in a difficult situation. He decides to help her out of a sense of an old, unspoken connection. As they spend time together, they start to understand each other better and a relationship begins to form.
The baby could also have a special connection to the spirit world. Bonnie, with her witch powers, and Klaus, with his long and complex history, could find themselves on a journey to understand this connection. They might meet different spirits who either offer guidance or pose a danger to the baby as it grows up.