Well, in these desperate times in Harry Potter fanfics, the characters' personalities can be both strengthened and distorted. Harry might become more brooding and withdrawn as he shoulders the burden of the situation. Hermione's determination could turn into an almost obsessive drive to find solutions, sometimes at the cost of her own well - being. And Ron could experience a crisis of confidence that makes him question his place in the fight. But overall, these desperate times also offer opportunities for them to discover new aspects of themselves and their magic, as they are forced to dig deep and use every resource at their disposal.
One common plot twist is the revelation of a hidden power within a minor character. For example, a previously overlooked Hufflepuff student might turn out to have a powerful ancient magic that could turn the tide in the desperate situation. Another is the betrayal of a seemingly loyal character. Maybe someone from the Order of Phoenix is secretly working for the other side. And sometimes, there's a discovery of a new prophecy that changes everything the characters thought they knew about the battle against the dark forces.
Dumbledore would be devastated. He had placed so much hope in Harry as the one to defeat Voldemort. He would likely feel a great sense of guilt for not being able to protect Harry. The Weasley family, especially Ron, would grow up without their friend. Ron might be more subdued, lacking the adventures and growth that came from being Harry's friend. Hermione would also be affected. She might become more withdrawn, as she had found in Harry a kindred spirit in the pursuit of knowledge and justice. Without Harry, the Hogwarts students would also lack that symbol of hope and resistance against the dark arts.
Hermione and Harry are the central figures. However, other characters like Ron also get affected. Ron's relationship with Hermione and Harry is put to the test because of this law. He might feel jealous or left behind. Also, characters like Dumbledore or Snape (if the fanfic includes them in this context) could play roles in either supporting or opposing the law which in turn affects Hermione and Harry.
It would completely change the nature of the story. Harry Potter is seen as a hero, and this act would make him a villain. It would be a huge deviation from the original story's positive values.
The other students at Hogwarts would also be affected. For example, Neville, who looks up to Harry. If Harry ignores everyone, Neville might feel lost. Ginny, who has a special connection with Harry, would be deeply hurt. And the teachers like Snape, who has a complex relationship with Harry, would also be impacted. Snape might be secretly glad at first, but then realize that Harry's isolation could be a sign of a bigger problem in the wizarding world.
The Death Eaters themselves would be affected in an interesting way. Some might welcome Harry with open arms, but others might be suspicious of his sudden change of sides. They might fear that it's a trick by the Order. And within Hogwarts, the students would be in turmoil. Those who idolized Harry would be heartbroken and confused, and there could be a split among the student body depending on who believes Harry's new stance.
For Tom Riddle, his Alpha personality could lead to him being even more ruthless. He'd use his Alpha - like charisma to gain followers more easily. Harry Potter, as an Omega, could develop a more empathetic side. He might be more in tune with the emotions of others around him. This could either be a weakness that Tom tries to exploit or a strength that Harry uses to his advantage, like understanding the true motives of his enemies better.
Obviously, Harry Potter himself is the most directly affected as he doesn't survive. But then there are his friends like Hermione and Ron. They would be deeply affected, probably filled with grief and guilt. Hermione might blame herself for not being able to come up with a better plan to save Harry. Ron would be devastated, as Harry was not only his best friend but also like a brother to him.
The false 'gay evil Harry Potter story' has no place in the true fandom. However, it can be a nuisance. It might discourage new fans from getting into the series if they are exposed to such false and off - putting ideas. But the core of the fandom, those who truly love and understand the series, will always uphold the real values of Harry Potter and reject such false and offensive concepts.
He would have to learn to adapt his magic use. In medieval times, magic was often associated with the devil or dark forces. Harry would need to be careful not to draw too much attention or he could be in danger. He might also have to find new ways to communicate, as the language and culture were very different.