When Harry tells his story, it could bring the wizarding community closer together. His experiences are so unique and full of lessons. He could inspire the younger generation to be brave and stand up for what's right. Also, it might make the older generations realize how much they've underestimated the kids during the fight against the Dark Arts.
Well, it could be about Harry Potter finally sharing all the hidden details of his adventures at Hogwarts. Maybe he'd talk about his first time seeing the Philosopher's Stone and how scared he was.
There would also be other characters like Neville. Harry might talk about how Neville grew from a shy and clumsy boy to a brave hero. Luna Lovegood could be in it too. Harry could share his experiences with her, like their time together in the Department of Mysteries. And characters like the Weasley family members, especially Ginny, who became an important part of Harry's life, would also be likely to be mentioned.
One reason could be that Harry wants to preserve the integrity of his real story. Fanfiction often takes the original story in different and sometimes wild directions. He might worry that it could distort the truth about his adventures, his friends, and the sacrifices made. For example, some fanfictions might create romantic relationships that didn't exist or change the motives of characters, which could mislead those who are new to the real story of Hogwarts and his battles against Voldemort.
The headmaster might be a bit surprised at first. He would likely respect Harry's opinion, though. He has always valued Harry's thoughts and feelings. He may start to think about the implications of fanfiction on the wizarding community and how it might affect the students and the overall perception of Hogwarts.
Perhaps at a big gathering in the Great Hall. After all the chaos and battles, everyone is eager to hear his story. Harry stands up on the dais where the teachers usually sit and starts from the very beginning, about how he grew up not knowing he was a wizard, living with the Dursleys. He tells of the strange things that used to happen to him that he didn't understand at the time.
The main characters would be Harry and his kids. But other important figures from his past would be included. Neville Longbottom could be mentioned, as they were comrades in the fight against Voldemort. And Ginny, Harry's wife, might be brought up as well, as she was an important part of his later Hogwarts years and his life in general.
Maybe it could involve Harry sharing his adventures at Hogwarts, like the time he faced the basilisk in the Chamber of Secrets. He might tell his kids about his friends, Ron and Hermione, and how they overcame difficulties together.
Maybe he was in sudden pain. It could be due to a spell that backfired on him and affected his diaphragm area, causing him to clutch it instinctively for relief.
No, it's not a common trope. Most Harry Potter fanfiction focuses on more traditional elements like magic, relationships, and adventures. This phrase seems rather unusual and not something that typically appears in mainstream fanfiction.