Well, of course, there would be the 'Prince of Elves'. He is likely to be a central figure with unique powers and a noble lineage. There might also be Harry Potter himself, as it's related to the Harry Potter universe. His presence could add an interesting dynamic, maybe as an ally or an unexpected foe.
There could also be a villain in the fanfic. It could be a dark wizard who has a vendetta against the elves or wants to use their power for his own evil purposes. This villain would be constantly causing trouble for the 'Prince of Elves' and his allies, creating conflict and driving the story forward.
There could be an elf mentor character. This elf would be wise and experienced, guiding the 'Prince of Elves' through his journey. They would teach him about elf magic, traditions, and how to deal with the threats facing the elf kingdom. And then there might be a group of friends or comrades that the 'Prince of Elves' gathers around him, each with their own special skills and personalities.
There could also be other important characters like the Slytherin house - mates. Maybe a really cunning and ambitious friend who helps or hinders the main character's journey. And of course, there might be appearances from the more well - known characters from the original Harry Potter series, like Draco Malfoy, who could play a significant role in the fanfic, either as an adversary or an unexpected ally.
The main characters would include Harry Potter, who is the experienced wizard. The Prince of Arendelle, who represents the leadership of his kingdom. Then there could be Hermione as well. She could come to Arendelle with Harry and use her intelligence to figure out how the magic in Arendelle works and how it can be combined with the magic they know from Hogwarts. Ron might also tag along and provide some comical relief during their adventures in Arendelle.
The main characters would include the Dark Prince himself. Then, we might see characters from the original series like Neville Longbottom having a more prominent role in this fanfic. Maybe he becomes one of the key resistance fighters against the Dark Prince. And there could be some new characters introduced, like a mysterious wizard from a far - off land who has some knowledge about the Dark Prince's true nature and comes to Hogwarts to help in the fight against him.
The elves themselves would be major characters. There could be an elven leader, perhaps an old and wise elf who is the head of the council. Also, Hermione might be involved as Harry's friend and often his partner in adventures. She could bring her vast knowledge of magic and research skills to help Harry in dealing with the council of elves.
One interesting plotline could be the exploration of the relationship between the main character and the elves. Maybe the main character discovers a hidden power among the elves that could change the wizarding world. For example, they might find a way to use elf magic in a new way that no one has thought of before.
Dobby is often a very popular character in house - elves fanfic. His rebellious nature and his loyalty to Harry Potter make him an interesting subject for further stories. Writers can explore his life before and after his freedom.
It could be Harry Potter himself, as the title still has 'Harry Potter' in it. So, the story might revolve around him in this new vampire - infused plot.
There's also 'The Secret of the Elven Artefacts'. This fanfic delves into the hidden world of elven - made artefacts. The story follows a group of students who stumble upon these artefacts and discover that they hold great power. Along the way, they meet various elves who play crucial roles in their adventure.
In Harry Potter fanfic, elves are often portrayed in diverse ways. Some fanfics might expand on the house - elves like Dobby and Winky. They could be given more complex personalities, for example, an elf who is not only subservient but also has dreams of freedom and education. Some might show elves with magical abilities beyond what was shown in the original books, like the ability to transform into other creatures momentarily to escape danger.
Voldemort could also play an important role. Since Harry is now the dark prince, there could be a complex relationship between them. Voldemort might see Harry as a potential ally or a threat, and their interactions would surely be a major aspect of the fanfiction, along with how Harry navigates this new relationship with the most feared dark wizard.