It could also be some of the teachers or school officials who have been unfair to Harry. For example, if there was a teacher who always favored other students over Harry or punished him unjustly, Harry might seek revenge with Snape's help. Snape could use his own knowledge of the school's politics and power dynamics to expose the teacher's wrongdoings or undermine their authority in a way that benefits Harry.
The Death Eaters who have caused harm to Harry's family and friends are also probable targets. Snape, having been a double - agent among the Death Eaters, could help Harry take revenge on those who have killed his parents or endangered his loved ones. He could provide crucial information about their whereabouts or weaknesses.
In some versions, Snape might use his knowledge of the Dark Arts to expose the wrongdoings of those who have wronged Harry. For example, if there are Death Eaters or bullies in Hogwarts who target Harry, Snape could reveal their secret plans or actions that are against the school rules or the wizarding law.
The Death Eaters could be targets too. They might have looked down on Snape at times or made his life difficult within the Dark Lord's ranks. Snape could use his knowledge of their secrets and weaknesses to take revenge. Also, in some fanfictions, Dumbledore could be a target. If Snape feels that Dumbledore used him or lied to him, he might seek revenge on the old wizard, although this is a less common but very interesting take.
In some fanfictions, Harry might expose Snape's past wrongdoings to the whole school. For example, if Snape had been unfair in grading or showing favoritism to certain students, Harry could find evidence and make it public. This would damage Snape's reputation among the students and teachers.
One creative way could be that Harry, with the help of Hermione's research skills, discovers a long - forgotten magical law or rule that Snape has unknowingly violated. Then Harry could report this to the proper authorities in Hogwarts, like the Headmaster or the Board of Governors. This would lead to Snape facing some sort of disciplinary action.
Ron might support Harry at first. Since he's Harry's best friend, he would be on Harry's side without really knowing the full story. He'd probably offer to help Harry with some of his revenge plans, like distracting Ginny while Harry sets up a magical prank.
His friends from Hogwarts like Ron and Hermione. They are always by his side and would probably be more than happy to help Harry get revenge on the Dursleys. They might use their magic skills together to create some really interesting revenge scenarios.
Obviously, Harry Potter himself is the central figure. His friends like Ron and Hermione would also be involved. They would support Harry in his revenge plans, with Ron providing his loyalty and Hermione using her intelligence to strategize. Ginny Weasley might also be part of it, as she is Harry's love interest and a strong - willed witch in her own right.
One possibility could be that Harry uses his fame and influence in the wizarding world against Snape. For example, he could spread rumors about Snape's past misdeeds that were overlooked during the war. Harry might also use his skills as an Auror to dig up some dirt on Snape, perhaps something related to his time as a Death Eater. Another way could be that Harry uses his friendship with Hermione and Ron to come up with some elaborate pranks to embarrass Snape in front of the students and faculty at Hogwarts. Maybe they could use magic to make Snape's potions backfire during a class demonstration or cause his robes to change color unexpectedly.
Hermione is a must. Her intelligence and extensive knowledge of magic and Hogwarts rules would be invaluable. Ron would be involved too. He's Harry's close friend and has a bit of a mischievous streak himself. Fred and George Weasley are very likely to be part of it. They are known for their love of pranks and their dislike of authority figures like Umbridge. Luna Lovegood could also be included. She has a unique perspective and might come up with some really out - of - the - box ideas for Harry's revenge on Umbridge. Plus, her presence would add an interesting and somewhat dreamy element to the whole revenge plot.
Harry might start by making a list of all the wrongs Snape has done to him over the years. This would include things like unfair grading, public humiliation, and general nastiness. Then, he could look for ways to expose these actions to the rest of the wizarding world. Maybe he would use the wizarding newspapers or even start his own blog (if there were such a thing in the wizarding world) to share his experiences. He could also try to find allies among the students and faculty who have also had problems with Snape.