One idea could be that Hiccup's transformation into a vampire gives him enhanced abilities like super speed and strength. This could make him an even more formidable dragon trainer as he can keep up with the dragons better. He might also have to deal with the thirst for blood, which could be an interesting internal struggle. Maybe he tries to find a way to control it without harming anyone, like finding a substitute for blood.
In this fanfiction scenario, Hiccup's personality would be a mix of his old self and new vampire traits. He'd still be the intelligent and creative Hiccup we know. But his confidence could grow in a different way. Instead of relying on his inventions and dragon - training skills, he'd start to rely on his vampire powers. This could make him a bit more cocky at times. At the same time, he'd be more in tune with the night and solitude, which could make him seem more mysterious to those around him. His relationship with Toothless would also be affected. He might worry that Toothless won't accept him now that he's a vampire, but in reality, Toothless would probably still be his loyal friend.
Well, it could be that Hiccup is cursed by an evil sorcerer who wants to turn him into a dragon as a form of punishment. But as he turns into a dragon, he finds that he has a new connection with the dragon world. He starts to see things from a dragon's perspective and uses this to bring peace between humans and dragons in a whole new way.
One possible scenario could be that Finn, after being turned into a vampire, struggles with his new identity. He might have to deal with the urge to drink blood while still holding onto his old values. For example, he could try to find alternative ways to satisfy his thirst that don't involve harming humans, like drinking animal blood.
One idea could be that Stiles is turned into a vampire against his will. Maybe he's attacked one night while out investigating something supernatural. As a vampire, he has to struggle with his new urges, like the thirst for blood, while still trying to be the same person his friends know. He might start to see the world in a different light, both literally and metaphorically, as his vampire senses heighten.
One possible story could be that Mimiko is bitten by a mysterious vampire one night while walking alone. She then starts to experience strange cravings and enhanced senses. At first, she's terrified, but as time goes on, she begins to embrace her new vampiric nature.
One great Hiccup vampire fanfiction could be 'Hiccup: The Vampire Dragon Rider'. It might explore how Hiccup's dragon - riding skills are affected by his new vampire nature. Another could be 'Vampire Hiccup in a New World' which could focus on his adventures in a world that is both fearful and fascinated by vampires.
One of the main attractions is the ability to break free from the constraints of the original story. In the world of vampire Hiccup fanfiction, the rules can be rewritten. He could have new abilities, face different challenges, and have a different moral compass. The idea of a vampire Hiccup also opens up possibilities for different settings, like a dark and moody vampire - infested city or an ancient castle. And the romantic aspect, if included, can be really exciting as well, whether it's a forbidden love with a human or a complex relationship with another vampire.
Check out Wattpad as well. There are a lot of emerging writers on Wattpad who might have created some interesting vampire Hiccup fanfictions. The advantage of Wattpad is that it often has a more interactive community. You can leave comments and engage with the authors directly, which can enhance your experience of exploring these fanfictions.