It changes Harry's view of Snape completely. Harry already had a very complex relationship with Snape, but this act would make him see Snape as an even greater enemy. He would be filled with rage and a thirst for revenge. Hermione and Ron would also be very affected. They would support Harry in his quest to avenge Dumbledore and would see Snape as a traitor to the wizarding world.
For the Death Eaters, it might initially seem like a victory. But some of them might be suspicious of Snape. They know that Snape has always been a bit of an enigma, and his sudden act of killing Dumbledore could make them wonder if he has some ulterior motive. On the other hand, for the Order of the Phoenix, it's a huge blow. They lose their leader, and they are now more determined than ever to fight against Voldemort and his followers, including Snape.
Among the students, Harry's action would make him a very polarizing figure. Some students would see him as a hero for taking a stand against the all - powerful Dumbledore, while others would view him as a troublemaker. This would completely change the social dynamics within the school. The younger students might look up to him with a mix of awe and fear, while the older students might be more critical of his actions.
Well, it could make Hermione very worried. Since she's usually the one who supports Harry and tries to keep him on the right path. If Harry refuses to help Dumbledore, Hermione might try to persuade him. This could create some tension between them if Harry is stubborn. For example, she might think Harry is being selfish or short - sighted.
In the wider wizarding world, it could make Harry a controversial figure. Some might see him as a rebel who is undermining the great Albus Dumbledore. Others, especially those who have had doubts about Dumbledore's secrecy, might start to view Harry as a brave truth - seeker. This would change how various wizarding families and factions interact with Harry, either distancing themselves or becoming more interested in his cause.
The relationship would become very strained. Harry's rejection would likely make Dumbledore re - evaluate his actions and how he has interacted with Harry. Dumbledore might be shocked at first, since he probably thought Harry was on the same page as him most of the time.
Padmé would be devastated. She loved both Anakin and Obi - Wan. Her relationship with Anakin would become extremely strained, if not completely broken. She might try to stop Anakin from further falling into the dark side or, in her grief, turn against him.
His relationship with Dumbledore would also be transformed. Harry might be more suspicious of Dumbledore's actions in the past, especially if he discovers things about his mother that Snape knew all along. He could question Dumbledore's motives more deeply and not be as blindly trusting as in the original series. This could lead to a more strained relationship between them, at least initially, as Harry tries to figure out the truth about his family and Dumbledore's role in it.
The relationship turns into one of opposition in some fanfics. Harry, now independent, may be working towards goals that Dumbledore doesn't approve of. Dumbledore may see Harry as a loose cannon and try to control him from a distance, while Harry resents any such attempts. Their interactions become tense and full of unspoken accusations.
For Annabeth, it would be a huge shock. She would likely be torn between her loyalty to Percy and her friendship with Thalia. It might make her question everything she thought she knew about Percy. With Grover, he would be deeply disappointed in Percy. Their friendship would be severely strained as Grover is a peaceful being and the act of killing a friend like Thalia would go against Grover's values.
The power dynamic also shifts. Usually, Dumbledore is seen as a mentor and a figure of authority. But when Harry denounces him, Harry is challenging that authority. In some fanfic, this could lead to a power struggle within the wizarding community as others take sides. It can also cause Harry to seek new allies who share his view of Dumbledore, changing the social fabric of the story.
On the other hand, it could also lead to a strange kind of understanding. Maybe Harry realizes that Snape is under a great deal of pressure and that the punch was a momentary lapse. This could make Harry more empathetic towards Snape, although he might still be angry about being punched.