Yes, if Griffindor had made a mistake in the past but later showed remorse and tried to make up for it. For example, if Griffindor accidentally put Harry in danger but then risked his own life to save Harry, that could be a reason for forgiveness.
Well, in a lot of fanfictions, forgiveness is a big theme. If the writer wants to explore the idea of redemption or growth, Harry could very well forgive Griffindor. However, if the fanfiction is more about conflict and drama, Harry might hold a grudge. There are also cases where Griffindor might not even do something that requires forgiveness in the first place in a particular fanfic.
Well, perhaps because fanfiction often expands the Harry Potter universe in creative ways. It can bring new perspectives and stories that don't necessarily conflict with the original work. So Harry, as a character, has no reason to oppose it.
One possible reason could be that fanfiction often takes creative liberties with the original story and characters. Harry Potter might be seen as a very personal creation of J.K. Rowling, and she (or in this case, the fictional Harry Potter) may not want it to be distorted in fan - made stories. Fanfiction can sometimes change the essence of the characters or the plot in ways that go against the original vision.
It could mean that the official Harry Potter brand or those in control of the intellectual property don't support or condone fanfiction. Fanfiction often takes existing characters and settings and creates new, unlicensed stories. Maybe they see it as a violation of their creative vision or copyright.
Harry might be initially skeptical. After all the years of torment from Dudley, he can't just immediately trust this change. But if he sees that Dudley is truly sincere, he could accept the apology with grace.
The relationship between Harry and the Gryffindor house is likely to be strained. Since Gryffindor is the namesake of the house Harry belongs to, this lack of forgiveness could cause a rift among the students. Some might side with Harry, while others might defend Gryffindor's legacy, creating internal conflicts within the house.
One reason could be copyright issues. The creators of Harry Potter own the rights to the characters and story, and fanfiction often uses these without permission.
Maybe he doesn't like the way his character is often misinterpreted or distorted in fanfiction. Some fanfictions might take his character in directions that he would find unacceptable or disrespectful.
It could introduce a new and different perspective. Most of the time, Gryffindor is seen as a heroic figure, but this fanfiction challenges that view. It might make other fanfiction writers explore the idea of the founders not being as perfect as they seem.
Maybe he feels betrayed by Gryffindor's actions or values that have been misrepresented in the fanfiction. It could be that Gryffindor did something that went against Harry's own moral code, like sacrificing the innocent for the so - called greater good.