There could be. However, since these are two very different franchises, it might be a bit rare. The Harry Potter world is full of magic, wizards, and Hogwarts, while Blue Bloods focuses on a family in a more real - world, law - enforcement - related setting. But that's exactly what makes the idea of a crossover so exciting for some fanfiction writers. They might come up with unique scenarios where the characters interact in unexpected ways.
It could be a story where Erin Reagan discovers the magical world of Harry Potter. Maybe she stumbles upon a hidden wizarding alley in New York while investigating a case. And then she has to deal with the new - found knowledge of magic while still handling her duties in the police force.
In some fanfics, Erin might get hurt physically during an investigation. Her family's reaction to her being injured can be a very emotional scene. They might be worried, angry at the situation, and it shows the deep family bonds. For example, her father might be strict but also show his soft side as he worries about her.
One great Erin OC fanfiction is 'A New Beginning for Erin'. It delves into the character of Erin with a new original character added to the mix. The OC brings out different aspects of Erin's personality as they work together on cases. It's a really interesting read that gives a fresh perspective on Erin's story within the Blue Bloods universe.
It's special because it allows fans to put their own creative spin on the Blue Bloods world. With an OC in the mix, the possibilities are endless. You can create unique dynamics between Erin and the OC. Maybe the OC is a rival at first, but then they become friends or more. It adds depth and variety to the existing story.
Some writers develop her character by exploring how the hurt affects her relationships. If Erin is physically hurt, it could make her more cautious in future investigations, which might strain her relationship with her partners who are used to her more daring approach. This complex exploration of her character through the lens of being hurt makes for an interesting read.
It could be someone related to a mob or criminal organization that Erin is investigating. They see her as a threat to their illegal operations and decide to take her out before she can expose them.
The theme of justice also runs through a lot of Jamison Reagan fanfics. He is shown to have a strong sense of right and wrong, just like the rest of his family. But in some fanfics, he might take a different approach to achieving justice compared to his more traditional family members, which makes for some great storytelling.
I've read a fanfic called 'Jamison at the Precinct'. In this one, Jamison gets involved in a case at the precinct. It's full of action and also some heart - warming moments as he interacts with his family members who are also in law enforcement. It gives a great insight into his character in a professional setting.
She could be a new student at Hogwarts. Maybe she's a transfer from a different magical school in another country. This would be an interesting way to introduce her character as she'd have different knowledge and experiences compared to the regular Hogwarts students.