It might also be a Slytherin student. Since Slytherin is associated with the element of water, it would make sense for a Slytherin to have mermaid inheritance. This character could initially struggle with their new identity as it might conflict with the traditional Slytherin values they've been taught, but eventually they could use it to their advantage and show a different side of Slytherin house.
It could be a new student at Hogwarts. A young witch or wizard who has no idea about their mermaid inheritance until strange things start happening, like being drawn to water or having dreams about the ocean. This new character would bring a fresh perspective to the Harry Potter universe and their journey of self - discovery would be exciting to follow.
Maybe it could be Luna Lovegood. Given her unique and open - minded nature, she would be an interesting character to have mermaid inheritance. She could use her already - existing knowledge of magical creatures and her intuition to navigate the challenges that come with it. Her friends in Gryffindor and Ravenclaw could be both confused and intrigued by her new abilities.
A descendent of an old wizarding family that was once involved with Nundu. This character might be a Gryffindor, brave enough to face the challenges that come with the inheritance. They could be a bit of a rebel in the wizarding world, not afraid to break some rules to understand and control their new powers related to the Nundu.
A new character could be the main character in this fanfiction. Maybe a transfer student from a far - off magical school who has the siren inheritance. This character would bring in a fresh perspective to the Hogwarts environment. They would have to learn about the ways of Hogwarts while also dealing with the challenges and opportunities that come with their siren heritage, and make new friends and enemies along the way.
Maybe a dark wizard who has an interest in Harry's newfound inheritance. This antagonist could want to steal his powers or use him for their own evil purposes. They might see Harry as a key to unlocking some ancient and powerful magic that they've been seeking.
An older character like Hagrid could also be the main character in an inheritance - based fanfic. What if Hagrid discovers he has an inheritance from a long - forgotten giant tribe? This could change his relationship with the wizarding world and his role in protecting the school and its students.
Voldemort could still be the main antagonist. His dark magic would be in direct contrast to Harry's angel inheritance. He would see Harry as an even greater threat now and would do everything to stop Harry from fully realizing his new powers.
Harry Potter himself could be a main character. Given his central role in the original series, it would be interesting to see how he navigates a harem inheritance situation.
It could be a dark wizard who wants to steal Harry's inheritance for his own gain.
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.
Harry Potter himself could be a likely candidate. Given his central role in the series and his often - unique experiences, inheriting fallen angel traits would add a whole new dimension to his character. It could be a way to further his growth and development, and give him new powers to fight against Voldemort or other threats.
Voldemort could still be a main antagonist. Even if Fem Harry has a new inheritance, Voldemort would see her as an even greater threat. He might try to steal her inheritance or stop her from using it to defeat him. His Death Eaters would also be involved, trying to carry out his evil plans against her.