Definitely Harry Potter. He's the face of the franchise and his character is often associated with bringing people together. Then there could be Neville Longbottom. He grew so much throughout the series and could be a great example of how different houses can come together. Luna Lovegood might also be there. Her unique perspective and open - mindedness could help in uniting the houses. And I think we might see Draco Malfoy as well. His character has the potential for redemption and could be part of the story of uniting the houses, showing that even those from Slytherin can be part of the greater good.
One main theme could be friendship. In the original 'Harry Potter' series, the houses are often divided, but in this fanfiction, Harry might be the catalyst that brings students from different houses together, showing that friendship can transcend house boundaries. Another theme could be unity in the face of a common threat. Maybe there's a new dark force, and the houses have to work as one to defeat it, just like how they did against Voldemort in the books. And perhaps there's a theme of acceptance, where students learn to accept and value the qualities of those from other houses.
Well, in the 'Harry Potter unites the hallows' fanfiction, it could be that Harry discovers a deeper meaning behind the Hallows. He might realize that uniting them is not just about physical possession but also about uniting the different aspects of magic they represent. For example, the Elder Wand could symbolize power, the Resurrection Stone could represent life and death, and the Invisibility Cloak could stand for secrecy. By uniting them, Harry could be creating a new balance in the wizarding world.
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.
In addition to Harry, Hermione, and Ron, there could be other characters in this fanfiction. Dumbledore might play a role, even if it's just through his past knowledge or guidance that he left behind. Voldemort could also be a part of the story in some way. Maybe his spirit or his past actions are still influencing the wizarding world and Harry's need to unite the hallows is related to finally putting an end to Voldemort's dark legacy completely.
Perhaps in the fanfiction, there is a threat that only a united Hogwarts can face. Harry, along with his friends Hermione and Ron, starts to spread the message of unity. They hold meetings in the Great Hall, inviting students from all houses. Slowly but surely, the students start to cooperate, and they come up with a plan to defeat the threat using their combined knowledge and skills.
In fanfiction, Gryffindor's opposite could be Slytherin in some aspects. Gryffindors are often seen as brave and bold, while Slytherins are more cunning and ambitious. Hufflepuff, with its values of loyalty and hard work, could be considered opposite to Ravenclaw's focus on intelligence and knowledge. For example, a fanfiction might explore a story where a Gryffindor and a Slytherin have to overcome their house differences to work together, highlighting their opposing traits like the Gryffindor's straightforwardness against the Slytherin's deviousness.
There's a fanfiction where Harry is sorted into Hufflepuff by mistake. At first, he's disappointed but then he discovers the true strength of the house. He unites the Hufflepuff students to stand against the Slytherin bullies. They use their unique skills, such as the Hufflepuff's knack for herbology, to create magical plants that defend the weak students in the school.
In many of these fanfictions, Harry is the central figure, but there are also original Hufflepuff characters created by the authors. These characters might be new students who have some special abilities or knowledge. For example, a young Hufflepuff girl who has an uncanny ability to communicate with magical creatures. Harry teams up with her and other Hufflepuff students to explore a part of the Forbidden Forest that has been sealed off for centuries. Their combined skills of Harry's bravery and the Hufflepuffs' unique talents make for an exciting adventure.
McGonagall as the Head of Gryffindor is often very popular. She's strict but fair and her powerful magic and no - nonsense attitude make for great stories. Fans like to write about her making tough decisions for the good of Gryffindor and Hogwarts as a whole.