If Harry Potter gets help from the Queen in fanfiction, the Queen could offer her strategic wisdom. Given her experience in ruling and dealing with various threats, she could help Harry plan his battles against Voldemort. She might also introduce Harry to a network of powerful Muggles who could support his cause in different ways, like providing financial aid for the Order of the Phoenix or helping to spread anti - Voldemort propaganda among Muggles.
Well, in this kind of fanfiction, Harry might receive some sort of otherworldly knowledge or power from Death. Maybe Death gives him the ability to see the true nature of dark magic, which helps him in his fight against Voldemort. It could also be that Death shows Harry the fates of different characters, guiding his actions to ensure the best outcome for the wizarding world.
Well, it could be that the Queen, being a symbol of order in the Muggle world, has to deal with the sudden appearance of Harry Potter and the chaos that magic can bring. Maybe she initially mistakes his magic for some sort of advanced technology and there are a series of misunderstandings that lead to an interesting adventure. Harry could introduce her to the concept of Hogwarts and she might be fascinated by the idea of a school for magic.
In this fanfiction scenario, Harry could bring a touch of magic to the royal court. He might introduce some magical creatures to the royal gardens, like a friendly unicorn or some magical birds. His Gryffindor courage would make him stand out in royal events, and he could inspire the younger members of the royal family to be more brave and adventurous. Also, his experience with fighting dark wizards could be applied to protecting the Queen from any potential threats, magical or not.
In this fanfiction, perhaps Harry Potter would be in a state of great confusion when summoned by the queen. He might initially think it's some kind of dark magic trick. Maybe he'd be worried about leaving his wizarding world duties behind. And he'd likely be very curious about the Muggle royalty.
Well, it's possible that Harry gets a gadget that can translate any magical language instantly. This would be really useful when he's dealing with ancient spells or communicating with magical creatures from different regions. It could also lead to some comical situations, like when the gadget misinterprets a spell and creates a chaos of unintended magic.
In this fanfiction, Harry might use the staff for various magical purposes. Maybe it could enhance his existing powers. For example, it could help him perform more complex spells with greater ease. He could also use it to defend himself in a more unique way compared to just using his wand.
Well, perhaps Harry's new haircut makes him look completely different and his friends don't recognize him at first. It could be a humorous situation where they keep asking who he is until he reveals himself.
In this fanfiction, Harry might use the phoenix for various magical tasks. The phoenix could help him in his battles against Voldemort. For example, it could carry messages quickly or even heal his wounds with its tears.
In the 'Harry Potter gets knighted' fanfiction, perhaps Harry is honored for his heroic deeds against Voldemort. He might be knighted in a grand ceremony at Hogwarts, with all his friends and professors present. The Ministry of Magic could finally recognize his great contributions to the wizarding world.
Perhaps Death is a being from a different dimension in this fanfiction. It exists outside the normal rules of the wizarding world and has the power to interfere when it deems necessary. It could have its own motives for helping Harry. Maybe it wants to study the unique magic that Harry possesses, or it could be that there is a prophecy that ties Harry's success to the stability of the multiverse, and Death is simply acting to preserve the greater good.