Well, perhaps in the fanfiction, Jasper and Harry meet in a magical forest that is a sort of in - between place for different magical creatures. There, they discover a hidden prophecy that links their fates together. This prophecy could involve saving the wizarding world from a new and unknown threat that neither vampires nor wizards alone could handle. They then have to learn to trust each other and combine their powers.
One idea could be that Jasper Whitlock, with his vampire abilities, somehow gets transported to the Harry Potter world. He could use his skills in combat and his ability to sense emotions to help Harry and his friends in their fight against Voldemort. Maybe he could train the students in self - defense in a more unorthodox way compared to what they're used to in Hogwarts.
For Harry, you could explore his post - Hogwarts life more deeply. Show how his experiences with Jasper change his view of the magical world. Maybe he becomes more open - minded about non - wizard beings. As for Jasper, you can show his struggle to adapt to the wizarding world's rules. For example, he might find it hard to understand the concept of using wands instead of his natural vampire abilities.
One idea could be that Jasper and Bella discover a unique bond that helps them face the challenges in the vampire - human world together. For example, Bella's unique ability to resist vampire powers in the original story could be enhanced when combined with Jasper's gift of manipulating emotions.
One interesting plot twist could be that Jasper's vampire abilities are used to protect Harry from a new and unexpected dark magic. For example, Jasper might be able to sense a dark wizard's intentions before they attack Harry. Another twist could be that they discover a hidden connection between the wizarding world and Jasper's vampire world, like a shared ancient magic that only they can unlock together. It could also be that Jasper's ability to control emotions helps Harry deal with his own inner turmoil caused by Voldemort's presence, in a way that no one else in the wizarding world can.
One idea could be that they meet in a completely unexpected place, like a small European town during a music festival. Bella is there to experience new things after the events in her own story, and Peter is there to escape his past. Their initial encounter is full of tension as they sense something different about each other. Another plot could involve them having to work together to solve a mystery that involves both the vampire and human worlds. Maybe a new type of vampire is emerging that threatens both, and they must combine their unique skills and knowledge to stop it.
There are several common themes. For example, the theme of loyalty often comes up. Both Harry and Jasper are characters who value loyalty in their respective original stories. So in the fanfiction, their relationship might be strengthened by their loyalty to each other. Love and friendship are also big themes. How their relationship develops from an initial encounter to a deep bond, whether it's romantic love or a strong friendship, is often explored. And there's usually a theme of adventure as well, as they might go on quests or face challenges together in the fanfiction.
One idea could be that Harry and Percy meet during a magical convergence. They realize they can combine their powers to fight a new, powerful dark force that threatens both the wizarding world and the world of the Greek gods. For example, Percy could use his water powers to put out a magical fire created by a dark wizard, while Harry uses his magic to protect Percy from a monster attack.
One idea could be that Harry discovers a hidden magical connection to the vampire world through Alice. Maybe Alice has a premonition about Harry's role in a new, greater threat that involves both the wizarding and vampire realms. They then have to work together to figure out how to stop it.
Jasper could be a time - traveler OC. She travels back in time and accidentally disrupts the timeline where she meets a young Harry Potter. At first, Harry is suspicious of her, but as they work together to fix the timeline, they form a bond. As mates, they have to deal with the consequences of their actions in the time - travel, such as preventing certain events from changing too much and also protecting their relationship from those who would oppose a time - traveler being involved with Harry Potter.
The Volturi could be main antagonists. Since they have strict rules about vampires and humans, they might see Bella and Jasper's relationship as a threat to their order.