Well, perhaps a plot line could revolve around Stiles trying to find out more about his vampire heritage. He could go on a quest to find his vampire family, who may have been separated from him for some reason. Along the way, he meets other vampires who either help or hinder him. There could also be a power struggle within the vampire community regarding Stiles. Some might see him as a threat because of his special birth, while others might see him as a potential leader or a key to some great vampire power.
One possible interesting plot line could be Stiles struggling to hide his true vampire nature from his friends. For example, he might have to constantly come up with excuses for his super strength or aversion to sunlight. Another could be his discovery of an ancient vampire prophecy that he is a part of, leading him on a journey to fulfill it or avoid it. Maybe he also has to deal with vampire hunters who are specifically targeting him because of his unique 'born vampire' status.
Perhaps there could be a plot where Bella discovers she has a unique vampire ability that sets her apart from others. This could lead to her being both feared and revered within the vampire world. And she has to figure out how to use this ability for good or face the consequences of misusing it.
Stiles is the central figure in this fanfiction. Since he's a born vampire, he has his own set of characteristics and story arcs. His father could also be a significant character. In many fanfictions, the relationship between Stiles and his father is explored, especially when his father starts to suspect that something is different about his son. Additionally, if there are any vampire mentors or antagonists in the story, they would be main characters as well. They would either guide Stiles in his vampire journey or try to stop him from achieving his goals.
One idea could be that Percy struggles to control his new vampire instincts while also trying to hide his identity from his friends. Another could be that he discovers a hidden vampire society within his town and has to navigate their politics.
One possible plot could be that Harry, as a vampire, has to hide his true nature at Hogwarts. He might struggle with the urge to drink blood while being surrounded by his wizard friends. For example, during potions class, the smell of certain ingredients could trigger his vampire instincts, making it difficult for him to focus. And he may have to find a way to obtain blood without raising suspicion, perhaps by befriending some magical creatures that can provide a substitute or by secretly using his vampire powers to hunt small, non - magical animals in the Forbidden Forest.
One interesting plotline could be Edward exploring his unique vampire abilities from birth. For example, he might have a different way of controlling his thirst compared to other vampires. Maybe he has an innate power that helps him resist the urge to hunt humans more effectively.
In this fanfiction, after Stiles gets bitten by a vampire, he might find himself in the middle of a vampire war. The vampire who bit him could belong to one faction, and now the other faction sees Stiles as a threat or a tool. He has to learn about vampire politics and hierarchies quickly. His friends, especially those who know about the supernatural, would try to protect him. Stiles would also have to deal with the physical and emotional changes that come with being a vampire, like the isolation that can come from living a nocturnal life and the fear of hurting those he loves.
One possible plotline could be Harry struggling to control his new vampire instincts while still trying to protect his friends at Hogwarts. He might have to deal with the thirst for blood while attending classes and facing off against the Dark Arts. Another could be that he discovers a whole new vampire community within the wizarding world that has its own rules and power structures.
Well, it could be that Stiles' secret vampire fanfiction is actually a premonition. He starts writing about a particular vampire who then shows up in real life. But this vampire is different from the typical ones in the stories. Instead of being evil, it's trying to find a way to co - exist with humans. Stiles then has to use his knowledge from the fanfiction to help this vampire, all while still keeping his vampire - loving side a secret from his friends.
Well, it could be that Stiles meets Dracula in a modern - day setting where Dracula has adapted to the new world in unexpected ways. He might be running a high - tech company as a front for his vampire activities. Stiles, being the curious and intelligent character he is, starts to dig deeper and realizes that Dracula is planning to use his company's technology to create a new breed of super - vampires. Stiles then has to find a way to stop him, but in the process, he also discovers that there are some good things about Dracula's plan that could benefit both humans and vampires if done right.
One interesting plot twist could be that the kidnapper turns out to be someone Stiles thought was a friend all along. Maybe it was a werewolf in disguise who had a hidden agenda against Stiles or his friends. Another could be that Stiles discovers he has some hidden power during the kidnapping that helps him either escape or turn the tables on his captors. For example, he might find out he can communicate with spirits who guide him to safety.