In 'harry destroys the future fanfiction', Harry is the central figure. But there could be other characters as well. Dumbledore might play a role, perhaps as a guiding force in the past whose absence or misinformation in the changed future has led to the chaos. Voldemort or his followers could also be involved, if Harry's actions are somehow related to the remnants of the dark side. And Neville could be there too, as he has always been an important character in the Harry Potter universe, and his actions might be intertwined with Harry's in this fanfiction.
Well, Harry is the main character in this fanfiction. However, it's possible that new characters are introduced. For example, there could be a mysterious wizard or witch who has knowledge of the future and tries to prevent Harry from destroying it. Or there could be descendants of the current characters who are directly affected by Harry's actions in the future. Hermione and Ron are likely to be main characters as well, as they are Harry's closest friends and would surely be involved in any major events that Harry is a part of, especially when it comes to something as serious as the destruction of the future.
I'm not sure specifically as there could be many different interpretations in fanfiction. It might involve Harry making choices that have dire consequences for the future in the fictional wizarding world, perhaps through the misuse of magic or making wrong alliances.
Obviously, Harry would be the main character. He's the one doing the 'destroying' after all.
Obviously, Harry Potter's children like James, Albus, and Lily could be main characters. They would inherit their father's courage and their mother's intelligence, and get into all sorts of adventures at Hogwarts.
It could be one of the headmasters or organizers of the Triwizard Tournament who has a hidden agenda. They might be using the tournament for their own gain, perhaps to gain power or wealth, and Harry's actions to destroy it are thwarting their plans.
Another possibility is that there could be a new character introduced in the fanfiction, a mastermind who manipulates Harry into believing that his family is a threat. This new character could be the main antagonist.
No, it's not common. Usually, fanfiction focuses on positive relationships between characters, especially Harry and the Weasleys who are often portrayed as a close - knit family. So this would be a rather unusual and dark theme.
Obviously, Percy will be the main character. He is the one doing the destroying after all.
Obviously, Percy and Kronos are the main ones. Percy, the demigod son of Poseidon, is likely to be the hero of the story. Kronos, the powerful Titan, is the antagonist that Percy has to face.
There very well could be. Fanfiction writers often like to explore unusual crossovers. Since both Harry Potter and Thanos are extremely popular in their respective franchises, it's a ripe area for creative exploration. However, the quality and availability can vary greatly depending on the fanfiction platforms you search on.
Harry Potter himself would probably be a main character. After all, he's the hero of the original series and would likely be at the center of any attempt to fix the future. Hermione Granger would also be a key figure, with her intelligence and knowledge of magic.