A plot could involve her trying to reunite her family. Silas' story is filled with a lot of broken relationships. His daughter could be on a mission to bring together all the scattered members of their family. She might have to travel to different places, encounter various dangerous creatures, and face many challenges along the way. This would show her determination and her connection to her family's complex history.
One interesting plot could be her trying to break the curse her father is under. Since Silas has been trapped in a sort of limbo for so long, his daughter might feel a strong urge to free him. She could start by seeking out the powerful witches in Mystic Falls and trying to learn about the magic that was used to imprison him. Another plot could be her falling in love with one of the main characters, like Stefan or Damon. This would create a lot of drama as she has to balance her love for them with her loyalty to her father.
One interesting aspect in Silas - related Vampire Diaries fanfiction could be his relationship with other characters. For example, how he might interact with Elena or Damon in alternate scenarios. Maybe he uses his powers in different ways than in the show.
There might be a fanfiction where Silas tries to break the curse on Amara in a different way. He travels through different dimensions to find a solution, and along the way, they face many challenges together that test their relationship. This would add a lot of adventure and mystery to their story.
One possible plot could be that Flemming's daughter discovers she has a unique power that is related to the vampire lore in Mystic Falls. Maybe she can communicate with the spirits of the vampires' past victims, which throws her into the middle of the ongoing battles between vampires, werewolves, and witches. This power could be both a curse and a gift as she tries to use it for good while being hunted by those who fear her new - found ability.
Bonnie would be an interesting match. Bonnie is a powerful witch, and as Silas' daughter would likely have some sort of magical abilities too. They could team up to fight against common enemies or to solve some of the magical conundrums in Mystic Falls. Their relationship could be a bit rocky at first, as Bonnie might be cautious about getting involved with Silas' family, but over time they could develop a deep bond based on respect for each other's powers.
It's hard to say who the 'best' Silas is as it depends on personal preference. Some might like a more sympathetic portrayal of him, where he has redeeming qualities. Others might prefer a really menacing and powerful version that stays true to his villainous nature in the show.
In some fanfictions, there could be a plot where Rebekah and Elena become friends because of their shared experiences with the Salvatore brothers. They might bond over the fact that they both have complex relationships with Stefan and Damon. Rebekah could give Elena some insights into the vampire world from an original vampire's perspective, which Elena finds useful in her own journey.
One possible plot could be that the sister gets into some serious trouble in the Vampire Diaries world, like unknowingly making a deal with a vampire that endangers the family. Her older sibling decides to spank her as a form of punishment to teach her about the dangers. Another could be that she breaks a family heirloom that has some sort of protection spell in the vampire - filled town, and the spanking is more about her learning respect for the family's heritage in this supernatural context.
A plot that I find interesting is when the cure for vampirism in Vampire Diaries becomes a sought - after item in Lucifer's world. It creates a whole new dynamic as the characters from both shows scramble to either obtain or protect it. It's a unique take on the idea of a powerful item and how it can affect different supernatural realms.
Perhaps a fanfiction where Saraaa is a key figure in an alternate universe. In this universe, the rules of the vampire diaries world are slightly different. For example, instead of the sun and moon curse, there could be a curse related to Saraaa's existence. And all the characters' fates are intertwined with hers in unexpected ways. It could be a really cool exploration of a different take on the Vampire Diaries world.
In many fanfictions, Silas's character may develop from being a purely power - hungry villain. He might start to show more vulnerability when it comes to Amara. For example, he could sacrifice some of his power - seeking plans just to keep her safe.