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.
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.
A really interesting plot could be that a goblin mate has a unique magical ability that is the key to saving Hogwarts from a new dark threat. The wizarding characters initially doubt the goblin but gradually come to realize their importance and the power of their bond.
One plot idea could be that Fenrir's mate is a powerful witch who has the ability to control his werewolf side. She could use her magic to soothe him during his transformations and together they try to find a way to end the discrimination against werewolves in the wizarding world. This would involve them facing many challenges, such as the Ministry of Magic's strict laws and the prejudice of other wizards.
One idea could be a werewolf character finding their true mate among the Harry Potter characters. Maybe a werewolf who has always felt like an outcast in the wizarding world finally meets someone who accepts them completely. This could lead to a story of self - discovery and acceptance for both the werewolf and their mate.
Another plot could involve an OC who is a vampire hunter turned vampire. They meet Jasper and initially see him as an enemy but then gradually come to understand his different view on bloodlust. The OC could then have to decide whether to join the Cullens or go their own way, all while having a complex relationship with Jasper that includes elements of mistrust, admiration, and eventually love.
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 the OC is a mutant with a unique power that complements Wolverine's abilities. For example, the OC can manipulate time briefly, which helps Wolverine in a crucial battle. They meet when Wolverine is on a solo mission in a remote area and the OC is being hunted by anti - mutant forces.
Jasper can be developed by having her adapt to the unique culture of Hogwarts. For instance, she could struggle with the house system at first, not understanding why students are so divided. But as she spends more time with Harry Potter, she learns to appreciate it and even finds her own place within it. This would show her growth and integration into his world.
A possible plot is that the Gaunt OC is an outcast within the family due to their different views on magic. They believe in a more inclusive form of magic that accepts all wizards and witches regardless of blood purity. So, they run away from the Gaunt family and end up at Hogwarts. There, they face discrimination from some Slytherins who know of their family name, but they find friends among the other houses and together they try to change the perception of blood purity at Hogwarts.
Another plot could be that the OC is an outcast in the wizarding world due to their unorthodox magical abilities. They see Harry as a kindred spirit. When they adopt him, they take him on a journey to discover the true nature of magic, which is different from what is taught at Hogwarts. This could involve exploring hidden magical realms and learning from magical creatures that are not well - known in the wizarding community.