Well, it could start with Ethan being in a small town where vampires secretly live. He unknowingly gets involved with them and is turned into a vampire. After becoming a vampire, he discovers new powers within himself. He could have the power of super speed and strength. However, he also has to face the challenges of hiding his new identity from his family and friends, and at the same time, he has to learn how to survive in the vampire world which is full of rivalries and power struggles.
Another possibility is a vampire who wants to use Ethan for his own gain. He might try to manipulate Ethan into doing things that are against his will. This vampire could be part of a powerful vampire clan and wants Ethan to be his puppet so that he can gain more power within the clan.
Well, one possibility is that Sookie becomes a vampire and uses her unique abilities as a former human with telepathic powers to bridge the gap between humans and vampires even more. She could start a movement to promote better understanding and co - existence, which would put her in a dangerous position as there are many vampires and humans who oppose such ideas.
Well, perhaps Natsu could be turned into a vampire during a battle with a powerful dark magic user. Then he'd struggle with his newfound vampiric instincts, like the urge to drink blood, while still trying to be true to his friends and his guild.
Well, perhaps the plot could involve Hermione being bitten by a vampire during one of her adventures. Then she has to deal with her newfound vampiric nature while still trying to maintain her relationships with Harry and Ron. She might struggle with her thirst for blood and her moral code as a witch.
One possible plot could be that Yui, an ordinary girl, gets bitten by a vampire. She then has to deal with her newfound vampiric instincts like a craving for blood. She might struggle to fit into the vampire society which has its own rules and hierarchies. Maybe she tries to resist her darker urges and find a way to co - exist with humans.
Well, in 'jeremy becomes a vampire fanfiction', perhaps Jeremy is turned into a vampire by a mysterious vampire who has some special plan for him. As a vampire, he discovers new powers and abilities. He might get involved in a vampire society full of politics and rivalries. He has to learn the rules of this new world and figure out if he wants to be a 'good' vampire or not.
The plot could involve Tsukune being turned into a vampire against his will. He would then have to come to terms with his new identity. He might seek a way to reverse the transformation, leading him on a journey to find a cure. Along the way, he could meet other vampires who either help or hinder his quest, and he would also have to deal with the fact that his relationships with his non - vampire friends are now in jeopardy.
Well, perhaps Nagisa Shiota becomes a vampire and finds himself in a world of vampire politics. He has to navigate through different vampire clans, some of which might see him as a threat because he was a human before. Meanwhile, he's still holding on to his human values and trying to figure out if there's a way to co - exist with humans without causing harm.
Well, perhaps Finn gets bitten by a vampire while on one of his adventures in the Land of Ooo. As a vampire, he has to adapt to a new lifestyle. He might start to prefer the night and avoid the sun. His diet could completely change, which would be a big shock to his friends who are used to his normal eating habits.
Another idea is that Percy discovers he has a long - lost vampire heritage. As he becomes a vampire, he starts to unlock memories and powers related to his vampire lineage. He could go on a journey to find out more about his vampire ancestors and the secrets they held, all while adjusting to his new vampiric existence which is full of both challenges and newfound abilities.