One idea could be that the little sister discovers she has a unique power that no one else in the family has. Maybe she can communicate with spirits in a different way than Bonnie. Another could be that she gets involved in a love triangle with one of the vampire characters and a human from school.
Well, she could be the key to solving a big mystery in Mystic Falls. For example, she might find out that there's a hidden prophecy related to her family that no one knew about. And she has to figure out how to deal with it while also trying to keep her family safe from the various threats in town. She could also start her own secret coven of witches, different from the ones already in the show.
One idea could be exploring how the reborn character uses their knowledge of the show's events to prevent some of the tragedies that befell Elena. For example, they could try to stop the initial vampire attacks on Mystic Falls. Another plot could involve the reborn character trying to change Elena's relationships, like making sure she doesn't fall for Stefan right away and instead encourages her to explore other options. Maybe they also introduce new supernatural elements to the story that weren't in the original show, which could lead to new alliances and conflicts in Mystic Falls.
One idea could be that Dean and Elena meet when Dean is on a hunt in Mystic Falls. They initially clash because of their different approaches to dealing with the supernatural, but then they realize they can learn a lot from each other. Another plot could involve them teaming up to fight a common enemy that is a threat to both the world of Supernatural and The Vampire Diaries. For example, a powerful demon - vampire hybrid.
Well, in some of these fanfictions, the sister might have unique powers that are different from Elena's. For example, she could be a powerful witch with the ability to control time, which adds a whole new layer of drama to the story. Maybe she uses her powers to protect Elena from certain supernatural threats that Stefan and Damon can't handle on their own.
She could be developed by showing her growth in dealing with difficult situations. Like when a vampire attacks her friend, she could learn self - defense and become more independent. Also, her relationships with other characters can shape her. If she has a falling out with Elena over a boy, it can make her more assertive and strong - willed. She might also start to question the rules of the vampire - human - witch world and try to find her own place in it, which would show her as a forward - thinking character.
Well, a great plot could be that Elena discovers she's pregnant and it sets off a chain of events that forces her to re - evaluate her relationships. She might have to lean on friends like Bonnie and Caroline more than ever. And as for the pregnancy itself, there could be some sort of mystery about the baby having special powers or a unique connection to the supernatural elements around her.
One idea could be that Harry's little sister discovers she has a unique magical power that no one else in the family has. Maybe she can communicate with magical creatures in a way that even Hagrid is impressed by.
Bonnie also plays a big role. As a witch, she could be either a mentor or a rival to Elena's sister. If they're on the same side, they might team up to perform powerful spells. But if they're not, there could be some epic magical battles between them. Caroline is another character. She might befriend the sister and introduce her to the social side of Mystic Falls, or she could be jealous if the sister starts getting too much attention from the Salvatore brothers.
Well, a great plot could be that Percy's mortal sister is being targeted by a minor villain from the demigod realm. This villain thinks that by getting to her, they can get to Percy. So, Percy has to protect her while also trying to keep her in the dark about his world as much as possible. But as time goes on, she starts to piece things together. She could also make friends with some of the less powerful demigods who are more in touch with the mortal world, and they help her understand and deal with the situation.
One idea could be that Percy's little sister discovers she has a unique power that even Percy doesn't have. For example, she can communicate with the spirits of the old gods that have long been forgotten. This could lead to her going on a secret adventure to find out more about these ancient deities and how they can help in the fight against the new threats.
Well, perhaps she could be a talented artist in the fanfiction. She tries to get her art recognized in a world that's mostly focused on Logan's YouTube stardom. She might meet other young artists and they form a group to promote their work. Or, she could be a bit of a rebel and go on a road trip without telling Logan, leading to all kinds of adventures and self - discovery along the way.