There would likely be new characters as well. For instance, a young and brilliant wizard or witch who is a bit of a troublemaker but has great potential. This character could test Harry's leadership skills as the owner. Also, some of the old professors' relatives might come into play, like a nephew of McGonagall who has different ideas about how the school should be run compared to Harry, leading to some interesting conflicts and discussions.
Obviously, Harry Potter himself. Then there would be his friends like Hermione and Ron. They could be his advisors or teachers at Hogwarts. Dumbledore might also make an appearance in the form of a memory or a portrait that gives Harry guidance. And of course, the students of Hogwarts would be important characters too.
The pure - blood supremacists could be antagonists. They might not like the idea of Harry, a half - blood, inheriting Hogwarts and try to undermine his authority.
In this fanfiction, perhaps Harry decides to renovate Hogwarts. He could add new sections for different types of magic study, like a special wing for time - traveling magic research. Also, as the owner, he'd have to deal with the political aspects of the wizarding world trying to influence the school's curriculum.
One new character could be a half - giant half - wizard. He's often been an outcast in both the giant and wizard communities. When he comes to Hogwarts, he has to deal with the prejudices of the students and teachers alike. But he also has great strength and a unique perspective on magic. There could also be a character who is a descendant of a former Hogwarts headmaster or headmistress. This character could bring a sense of legacy and new secrets about the school's past.
The Weasley twins could also be potential allies. They are always up for some mischief but also have a good heart. They could use their creativity and knowledge of Hogwarts' secrets to help the fem Harry Potter in her journey as the heir. For example, they could help her find hidden areas of the school where she might learn more about her heritage.
Obviously, Harry Potter himself would be the central character. Then, Hermione Granger could be one of the members of the harem. She is intelligent and has a long - standing friendship with Harry. Ginny Weasley is also a likely candidate as she has a romantic interest in Harry in the original series. Luna Lovegood might be another, with her unique and dreamy personality adding an interesting dynamic to the harem.
It could also include some new characters created specifically for the fanfiction. Maybe a young wizard or witch from a minor house who plays a crucial role in uniting Hogwarts. They could have some special abilities or a unique backstory that helps in bringing the students together.
The heir themselves would be a main character, of course. And Harry Potter might still play a role, either as a friend or a rival to the heir. Dumbledore could also be a major character, guiding or observing the heir's journey.
Draco Malfoy is often a popular character in these fanfictions. After Hogwarts, he might be trying to redeem himself, or there could be a love story between him and a character like Hermione. His complex past and family history make for interesting storylines. Another popular character could be Neville Longbottom. He has grown so much during his time at Hogwarts, and in fanfiction, he could be a great teacher at Hogwarts, passing on his knowledge of Herbology and his courage to the new students.
Harry Potter himself is also very popular. He could be seen as an older, wiser apprentice passing on his knowledge of fighting dark magic to the new generation of students. His adventures against Voldemort give him a lot of experience to share.
Other main characters could include the ward's new friends at Hogwarts. They could be from different houses and have different personalities. Together, they form a group that helps the ward through various adventures, whether it's exploring the Forbidden Forest or uncovering secrets within the castle walls.