Maybe an older fan who has been part of the Harry Potter fandom for a long time. They have seen all the different interpretations and fan creations over the years. Writing 'harry potter reads the books fanfic' could be their way of adding a new and interesting layer to the already rich Harry Potter universe, as well as exploring Harry's character from a fresh angle.
A young writer, perhaps a student who has grown up with the Harry Potter books. They might be inspired by the idea of meta - storytelling, where the character within the story interacts with the fan - created content. They would write it to share their own take on how Harry would react to reading about himself.
Well, it could be that Harry Potter discovers some hidden books in the library at Hogwarts that are actually fan - written about his own adventures. He reads them to gain new perspectives on his life and the events around him.
It would be a really interesting experience. Albus Potter, being Harry Potter's son, would have a unique perspective. He might find some fanfics that expand on his father's adventures in ways he never thought of. He could be both amused and perhaps a bit critical, comparing the fan - created stories to the real events he's heard from his family.
Another possibility is that Harry interacts with some of the administrative staff in the DMLE. They might be the ones who first take his call and record the details. They could play a role in passing the information on to the relevant people within the department, and Harry might have to convince them of the urgency of the situation.
In the fanfic, Harry Potter could meet the new generation of students. They would be in awe of him. He might also encounter some of the ghosts, like Nearly Headless Nick, who would surely have some interesting stories to share since Harry left. And there's a good chance he'll meet the caretaker, who would probably give him a hard time about coming back and causing a stir. Moreover, he could cross paths with some of the older students who idolize him and want to learn from his experiences.
Albus Potter could react in various ways. He may feel a sense of protectiveness over his family's story. If a fanfic is respectful and well - written, he might appreciate it. However, if it distorts the facts or portrays his family in a negative light, he would probably be angry. He might also be intrigued by the new ideas and concepts that the fanfics introduce to the wizarding world he already knows so well.
He might be quite amused. Fanfics often contain different interpretations of the characters and the wizarding world. He could find some creative ideas in them that he never thought of before, like unique magical spells or new backstories for his friends.
Hermione might support Harry if she also sees some flaws in Dumbledore's leadership. She is very logical and if Harry presents her with solid evidence, she could side with him. For instance, if Dumbledore's actions are putting students in danger in some way, Hermione would want to protect her fellow students.
He might meet the house - elves that have been taking care of Potter Manor for generations. They could show him around the manor and tell him stories about his family.
Reading fanfiction could have a number of impacts on child Harry. Firstly, it might introduce him to different writing styles and voices within the fan community. He could encounter some really creative and engaging stories that make him think more deeply about the themes in the original books. On the other hand, some fanfiction may not be of high quality, so he'll need to develop the ability to distinguish between good and bad writing. Moreover, it could potentially lead to him being more involved in the fan culture, attending fan events or participating in online discussions about the stories and characters.
He could meet other young wizards and witches who are also working summer jobs. Maybe some from other wizarding schools.