Maybe it's Neville Longbottom. Imagine Neville, who has always been a bit of an underdog, has a secret love for Shibas. One day, he has to take a blood test for some mysterious reason. His love for Shibas might interact with the magic in his blood in an unexpected way, and he could be the main character who uses this new - found connection to solve some big problem at Hogwarts.
It could be a muggle - born character. They are already different in the wizarding world because of their muggle heritage. Add to that their love for Shibas. When they have the blood test, which is supposed to measure their magical potential or something, their Shiba - fan side could create a unique plotline. For example, their love for Shibas could be the key to unlocking a powerful but long - forgotten magic that the pure - blood wizards don't know about.
It could be a new student at Hogwarts. A young wizard or witch who has just discovered the magical world and also has a deep love for Shibas. They might be the one going through the strange blood test and their Shiba - loving nature could be what sets them apart in the story.
It might be a story where a wizard or witch is a huge Shiba fan and during a routine blood test in the Hogwarts hospital wing, they discover that their love for Shibas is somehow encoded in their blood. This could lead to all sorts of adventures, like finding a secret Shiba - filled magical realm accessible only to those with this 'Shiba - in - the - blood' trait.
Hermione could be the main character. She's always been curious about knowledge, so she might be the one to stumble upon the idea of a DNA test in the wizarding world. She could use her intelligence to figure out how to perform the test and then discover something amazing about her own family's magical lineage.
One idea could be that the blood test is a school project at Hogwarts. Students are required to do a detailed analysis of their own blood magic. Hermione would be super - excited and dig deep into research. Harry might be a bit worried as his blood has some unique connections to Voldemort. Ron, on the other hand, could discover something unexpected about his Weasley bloodline that has been lost in history.
It could be a dark wizard who wants to steal Harry's inheritance for his own gain.
It could be a long - lost relative of the founders. Maybe a distant cousin of Gryffindor, Ravenclaw, Hufflepuff and Slytherin. This person might have been hidden away for years and now resurfaces.
It could be a new character, perhaps a young witch or wizard who has just received their Hogwarts letter and then discovers this inheritance. This would be an exciting start to their magical journey.
Obviously, Harry Potter himself could be a central character. He might be drawn into the blood feud because of his reputation and his desire to maintain peace in the wizarding world. He could try to mediate between the feuding families.
It's hard to say for sure without reading it, but likely Harry Potter himself would be a main character. He's the central figure in the original series, so it would make sense for him to be involved in an inheritance test. Hermione Granger could also be a main character as she's always been very involved in the magical mysteries.
I'm not sure specifically as it's a fanfiction. But it could include some of the original Harry Potter characters like Harry himself, Hermione, or Ron, as their heritages are important in the main series. It might also introduce new characters who are central to the heritage test storyline.
Perhaps the author might introduce new characters as the main focus. For instance, a young wizard from a different house who has a special gift for magic but struggles with the magic test due to some personal issues. This character could befriend some of the existing characters and together they face the challenges of the magic test. Another possibility is that an older wizard or witch who is an examiner in the magic test becomes a main character, and the story could explore their backstory and how they came to be in that position.