Hermione could also be a main character. Maybe she uses her intelligence to come up with new strategies for archery or to solve problems during the tournament. Ron could be there too, providing comic relief and also being a loyal friend to Harry during the tournament.
Maybe in the fanfic, the archery tournament is a part of a larger magical competition among different wizarding schools. The archery part has some really high - stakes rules. For instance, if you miss the target three times, you get turned into a small animal for an hour. A Slytherin student tries to cheat by using a charmed bow that always aims perfectly, but gets caught by the enchanted referees. Meanwhile, a Hufflepuff student discovers that she has a natural talent for archery and becomes an underdog favorite in the tournament.
Obviously, Harry Potter himself would be a likely participant. He's always up for a challenge and has great courage. Ron Weasley might also join in. He may not be as naturally talented as Harry in some areas, but he's always eager to prove himself. Hermione Granger could participate too. She would approach it with her typical studious attitude, researching all the proper techniques and spells related to archery. Neville Longbottom could be another character. He has grown a lot in confidence and his skills with plants could potentially give him an edge if there are any plant - related aspects to the archery tournament, like using arrows made from special magical plants.
Perhaps there could be a plot where Voldemort's followers try to disrupt the archery tournament to create chaos at Hogwarts. Or a story where a new character from a different magical school is an archery prodigy and becomes friends or rivals with Harry during the tournament.
Filch could be an unexpected character. He might enter the tournament in a comical way, like he accidentally stumbles into the selection process and ends up being a participant. Another could be Peeves. He could disrupt the tournament in his usual mischievous way, or perhaps he is made a part of a task where the competitors have to outwit him.
Obviously, the students from Hogwarts would be the main participants. The Gryffindors, Hufflepuffs, Ravenclaws and Slytherins would all be eager to show their skills.
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.