Ron Weasley could be another main character. His loyalty and his ability to bring some humor to tense situations would make him an important part of the group. Also, his skills in wizard chess might translate to strategic thinking in other areas.
Hermione Granger would also be a main character. Her intelligence and vast knowledge of magic would be invaluable in any situation the heroes face. She could come up with strategies and solutions.
Obviously, Harry Potter himself would be a main character. He has the most experience in fighting dark wizards.
Wonder Woman is also very popular. Her strength, grace, and the message she represents attract a lot of fans. Writers can explore different aspects of her character, like her relationship with other heroes or her adventures in new storylines.
One interesting plot could be the heroes from different Hogwarts houses uniting against a new dark wizard threat that is more powerful than Voldemort. They might have to combine their unique magical skills and knowledge.
You could have a new generation of witches and wizards as the main characters. For example, the children of the original trio. They might be visiting the manor for the first time and discover something that their parents had missed. There could also be a misfit wizard who finds a sense of belonging at the manor, and his story could be the focus.
In a 'harry potter inquisitor fanfic', the main characters could include the Inquisitor, who is the central figure driving the investigations. Then there could be a new character, an exchange student from a far - off magical school. This student has a different approach to magic and catches the Inquisitor's eye. Additionally, Professors Snape and McGonagall could be main characters. Snape might be secretly working against the Inquisitor if he thinks their actions are unjust, while McGonagall could be trying to keep the peace between the Inquisitor and the students. The interactions between these characters would create a rich and engaging story.
Fred and George Weasley could be the main characters in a new business adventure. Maybe they expand their joke shop business to include international locations. They could come up with new products that are suitable for different wizarding cultures. For example, they might create a line of magical fireworks that are designed to celebrate different wizarding holidays around the world. They would have to deal with the challenges of international trade in the wizarding world, like different magical regulations and cultural taboos.
In a 'Harry Potter Windsor fanfic', the main characters could include Ron Weasley. He could bring his humorous and sometimes clumsy nature to the interactions with the Windsor family. Also, an older member of the Windsor family, like the Queen (in a fictional magical version), could be a main character. She could be the one who is initially skeptical but then comes to accept the existence of magic. And Dumbledore could play a role as the wise guide in any magical matters involving the Windsors.
Hermione Granger could also be a main character. With her intelligence, she would be quick to learn ninja techniques and could even help improve them with her knowledge of magic. She might study the ancient ninja scrolls and find ways to combine the knowledge of both worlds for the greater good.
Harry Potter himself could be a mutant in the fanfic. He might discover he has mutant powers on top of his wizarding abilities, like the power to heal without using magic spells. This would make his character even more complex and powerful.
Hermione could be one of the main characters. Her thirst for knowledge and powerful magic would make her a great addition to a coven. She could be the one leading the study of complex spells within the coven.