The main characters could include Harry Potter, of course. Then there could be a new character, a young wizard who is an expert in Muggle - wizard relations and is appointed as the liaison between the two worlds for this special project for Queen and Country. Hermione would be there to offer her vast knowledge of magic and its applications. And perhaps an older wizard, like Albus Dumbledore (even if he's dead in the original series, he could appear in flashbacks or as a spiritual guide) to provide wisdom and guidance to the younger wizards in their new mission.
Obviously, Harry Potter himself would be a main character. He has the experience and the leadership skills from his battles against Voldemort. Hermione Granger would also be important as she has the knowledge and intelligence to come up with strategies for using magic for the country. Ron Weasley could be there too, providing the loyalty and the comic relief. And perhaps some new characters from the Muggle government side who interact with the wizarding world characters.
Perhaps in this fanfic, the Ministry of Magic is under new management that is more closely allied with the Muggle government. Harry Potter and his friends are then given special tasks by the Queen (or her representatives) to use magic to improve the country. This could include using magic to clean up polluted areas, or to help in times of natural disasters. At the same time, they have to deal with internal wizarding politics that might oppose such close cooperation with the Muggles.
Dumbledore could make an appearance, even if it's in a memory or as a guiding spirit. His wisdom would be invaluable in setting up the guard. McGonagall too could be involved, she could help with training the new guard members in discipline and magical skills. Then there are the Weasley twins. Their creativity with magic could be used to create some unique security measures. They might come up with enchanted objects that can detect and repel any intruders. And Hagrid could also be part of it, his strength and his love for all creatures could be an asset, perhaps he could use some of his magical creatures to keep an eye out for danger.
Since I'm not familiar with this specific 'queen of the crunk harry potter fanfic', it could be a character that the author has made up to be the central figure. Maybe she's a witch who has a very different approach to magic compared to the characters in the original Harry Potter series. She might be the one who brings the 'crunk' element into the story, like having a very wild and unorthodox style of using magic.
Obviously, the Queen of England would be one of the main characters. Harry Potter himself would also be a key character as he is the central figure in the Harry Potter universe. Maybe Hermione could also be involved as she is very intelligent and could help the Queen understand the wizarding world better.
Obviously, the Queen would be one of the main characters. And Harry Potter himself would probably be in it too, since it's a Harry Potter fanfiction.
The main characters would be Harry Potter and the Queen. Harry, as the hero from the wizarding world, brings his magic, courage, and sense of justice. The Queen represents the Muggle royalty and all the power and traditions that come with it. There could also be some secondary characters from the wizarding world like Hermione and Ron, who might give advice to Harry on how to interact with the Muggle Queen.
It could be a Muggle - born protega. This character would face unique challenges as they try to protect the wizarding world while also dealing with their own identity issues. They might have friends among the Hogwarts students, and together they form a group to counter a new evil force that targets both Muggles and wizards.
Obviously, Harry Potter would be one of the main characters. He's the hero of the original series and would likely play a central role in any fanfic about the basilisk. Hermione Granger would probably also be there, using her intelligence to help solve the problems related to the basilisk.
I don't know for sure as I haven't read this particular fanfic. But if it follows the general 'Harry Potter' lore, it could be Harry, Hermione, and Ron. They are often central characters in many fanfics and could be involved in whatever 'purge' is taking place in this story.
Without reading it, it's hard to say. But it could feature the main characters from the original series like Harry, Hermione, and Ron as they are usually central in most Harry Potter fanfics. They might be the ones trying to solve the conundrum.