Well, it might be that there is a big misunderstanding at first. Harry thought someone stole his money but later realizes it was just misplaced. So he simply finds it in an unexpected place in the fanfic and gets his money back without any real conflict.
In the fanfic, it could be that Harry has a very smart friend who helps him come up with a clever plan. For example, they might find a loophole in a contract that the person who has Harry's money was using to keep it. So, by exploiting this loophole, Harry is able to legally get his money back. Another possibility is that Harry has some special skills or powers in the story that he uses to his advantage. He could use his charm to persuade the person who owes him money or his intelligence to outwit them in a negotiation.
Perhaps there are some legal barriers. For example, the person who has his money might have some legal justifications for keeping it, at least on the surface.
Hermione could be the one. With her vast knowledge of the wizarding laws and her sharp intellect, she might dig up some old regulations that prove Harry's right to his money. She would then fight tooth and nail in the wizarding courts or against the goblins at Gringotts to get his money back.
Maybe he discovers some legal loophole in the wizarding world's financial system that allows him to reclaim his inheritance. For example, if there was some improper handling of his family's vault by the goblins at Gringotts, he could use that as a basis to demand his money back.
There's not enough information to determine exactly who Harry is. He could be a regular fanfic writer who uses the name Harry, or it could be a character within a particular fanfic universe who has this change in behavior regarding fanfic.
Yes, there are likely some 'Harry Potter' fanfics related to money. In the wizarding world, money is an interesting aspect. Some fanfics might explore how characters earn, spend, or inherit money. For example, a fanfic could be about Harry Potter discovering a hidden vault full of gold galleons and how it changes his life at Hogwarts or in the wizarding community.
I don't know who the author of 'harry spends his money fanfic' is. There are so many fanfic authors out there, and without more information, it's impossible to tell.
Perhaps in this 'harry fights back fanfic', Harry discovers some new powers or spells that he uses to fight back. He could be tired of being pushed around by Voldemort's followers or other bullies in the magical community, and he uses these newfound abilities to protect himself and his friends. For example, he might learn an ancient spell from a hidden book in the restricted section of the library. This spell gives him an edge in combat and he starts to turn the tables on his adversaries.
Obviously, Harry Potter himself. He's the main character who is going to fight back.
One popular theme is time -turner related plots. Since the concept of time -turning exists in the original Potter universe, many 'Back again' fanfics play with the idea of characters going back in time to change things. Another theme is redemption. Maybe a character who made mistakes in the original story gets a second chance to make things right when they go back. Also, there are often themes of self - discovery as characters re - experience parts of their past and learn more about themselves.
She might approach Harry casually at first. For example, she could bump into him at Diagon Alley and start a conversation about the latest magical items or news in the wizarding world. This would be a non - threatening way to break the ice and start re - establishing their connection.