Well, it could be that in the fanfic, Harry Potter uses his magic skills to protect the Queen from dark wizards who are plotting against her. Maybe he creates a powerful protective shield around the palace.
In addition to the main ones, there could be some original characters created for this fanfiction. For example, a wizard who is secretly working for the Queen's enemies. There might also be some magical animals that are either helping Harry or causing trouble. And of course, the Queen's advisers and guards would be part of the story as they interact with Harry and the magical world.
Perhaps it simply means that the concept of Harry Potter is being used as a symbol to defend Hogwarts fanfiction. In the broader Potter community, fanfiction is a big part of the culture. There could be debates about the value or propriety of Hogwarts - related fanfictions, and the idea of Harry Potter (either as a character or the essence of the series) is being invoked to support these fan - created works.
In this fanfiction, perhaps Voldemort is after some powerful magical artifacts stored in Gringotts. Harry, being the hero, steps in. He might have to face various challenges like dark magic traps and dangerous creatures inside the bank while trying to keep it safe. He could also form an alliance with the goblins, who are initially skeptical of him, but then see his determination to protect their precious bank.
Maybe Harry discovers that the goblins are being wrongly accused of something in the wizarding world, like being framed for a theft in Gringotts. So he decides to use his influence and skills to defend them, showing that not all goblins are bad and that they have been misjudged.
It could be a powerful dark wizard who has a grudge against the goblins and wants to destroy Gringotts. This wizard might have been wronged by the goblins in the past, and now he's seeking revenge by trying to bring down the bank. He could be using his own army of dark creatures to attack Gringotts.
It could be some of the pure - blood wizard families who have always looked down on goblins and consider them as inferior beings. They might oppose Harry's attempts to defend the goblin because it goes against their traditional views of the wizard - goblin hierarchy.
In this fanfiction, Harry Potter would interact with the Queen in a very unique way. Since he is used to the hierarchical system in Hogwarts, he would understand the importance of showing deference to the Queen. He could offer her a magical gift, like a charm that gives good luck. And the Queen, being curious, might ask him about his world. Harry would have to be careful not to reveal too much about the wizarding world to the muggles, but still satisfy her curiosity. There could be some misunderstandings too, for example, when Harry tries to explain some magic concepts using wizarding terms that the Queen doesn't understand.
In 'Harry Defends McGonagall' fanfiction, it might show Harry's loyalty and respect for McGonagall. He could defend her against false accusations or unjust treatment. Maybe it's set in a situation where McGonagall is being wrongly blamed for something, and Harry, with his sense of justice, steps up.
Well, when Harry defends Luna in fanfiction, it could be a way to explore different aspects of the Hogwarts' social structure. Maybe Luna is being targeted because of her unique beliefs or appearance. Harry, being the hero - type character, steps in. It not only showcases his character but also gives Luna a chance to shine more. It can lead to interesting plot developments like Luna teaching Harry something in return for his defense.