In a 'Harry turns into a vampire' fanfiction, the story could start with Harry being cursed by a powerful and ancient spell that turns him into a vampire. His friends at Hogwarts are initially scared and unsure how to deal with him. However, Harry is determined to find a way to reverse the transformation. Along the way, he discovers that there are some positive aspects to being a vampire, such as heightened senses that help him in his detective - like investigations into the origin of the curse.
It could be a powerful vampire clan that doesn't want Harry, a new vampire, to disrupt their ways. They might try to either kill him or force him to join their ranks against his will. They could see him as an outsider who doesn't belong in the vampire world and a potential danger to their secrecy.
Maybe Draco is jealous of Harry's popularity and power. Turning him into a vampire could be a way to strip him of his status among the wizarding community. Vampires are often feared and shunned, so Draco might think this would be a good way to get back at Harry.
Obviously, Harry Potter himself would be the central character as he is the one undergoing the transformation into a born vampire. His friends like Hermione and Ron would also be important characters. They would likely play a role in either helping Harry adjust or being conflicted about his new state.
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, if Snape turns Harry into a vampire in fanfiction, it would completely change the dynamic. Harry would have to deal with new instincts like the thirst for blood. His relationships would be strained as his friends might be scared of him. Also, his role as the 'Chosen One' would be redefined as he's now a different kind of being with different needs and abilities. He might have to struggle between his human side and his new vampire nature.
In this fanfiction scenario, it could lead to a whole new dynamic in their relationship. Sookie, as a human, has her own set of morals and values. But becoming a vampire would change her completely. Eric might do it out of love or perhaps for his own gain. If he turns her, she would have to adapt to a new way of life, dealing with the thirst for blood and the vampire hierarchy.
I'm sure there are. The Twilight saga has a huge fan base, and fanfiction writers love to play with different scenarios. Bella's character is central to the story, and her relationship with vampirism is a key aspect. A story where she turns into a vampire as a result of suicide could be a way to explore deeper emotions, different character arcs, and new relationships within the Twilight universe. However, such a topic can also be quite dark and might be treated with different levels of sensitivity in different fanfictions.
The fanfiction could go like this. Sonic is on a mission in a spooky, abandoned town. Unbeknownst to him, it's infested with vampires. One of them manages to turn him into a vampire. At first, Sonic is horrified. His appearance changes slightly, with paler fur and redder eyes. He has to learn to live with his new condition. His friends like Tails and Knuckles are confused and a bit scared. However, Sonic discovers that being a vampire gives him the ability to sense danger from afar. He then uses this to his advantage to protect the town and his friends from an even greater evil that's lurking in the shadows. Eventually, he might find a way to reverse the transformation and return to his normal self.
When Draco turns Harry into a vampire, it throws his friendships into chaos. His friends are used to the regular Harry, the one who battles Voldemort and plays Quidditch. Now, he has different needs and behaviors. Some friends may distance themselves out of fear. But others, like Neville, might be curious and try to help him adjust. His relationship with Ginny would also be tested as he has to deal with his new vampire nature and how it affects their relationship.