Hermione Granger could be involved. She's smart and might take an interest in how the Muggle government operates. She could help the Prime Minister understand the wizarding world better. Another character could be Arthur Weasley. His fascination with Muggle objects would make for some humorous interactions with the Prime Minister and also help bridge the gap between the two worlds.
The character of Sirius Black, if he were still alive in the fanfiction, could add an element of mystery and danger. He has a rebellious streak and might not be as concerned about the secrecy laws as others. His presence could put the Prime Minister in a difficult position as he tries to decide whether to trust this wizard who has a somewhat checkered past while also dealing with the potential threats that Sirius might be aware of.
Perhaps the Muggle Prime Minister is accidentally affected by a spell that makes him see magical creatures everywhere. He then has to deal with the chaos while also trying to keep it a secret from the public. He might start to question his own sanity until a wizard comes to his aid.
One interesting fanfic could be where the Muggle Prime Minister discovers the wizarding world in a more personal way, like accidentally stumbling into Diagon Alley. This could lead to a series of comical and also dangerous situations as he tries to understand and navigate this new world while also dealing with his Muggle responsibilities.
I'm not sure specifically if there is a well - known 'Harry Potter is the Prime Minister' fanfiction. But given the vastness of the fanfiction community, it's entirely possible. Fanfiction allows for all kinds of crossovers and alternate universes. So, someone might have written a story where Harry Potter, with his magical abilities and heroic nature, steps into the role of the Prime Minister to solve both magical and non - magical problems in a unique way.
Another theme is the discovery of the wizarding world by the Muggle Prime Minister. This often involves a sense of wonder and confusion as he is exposed to things like magic spells and magical creatures. It can be really interesting to read about his initial reactions and how he gradually comes to accept this new reality.
Obviously, Harry Potter and the prime minister would be the main characters. Harry, with his skills and knowledge of the wizarding world, and the prime minister, representing the Muggle leadership.
If Harry Potter became prime minister, the interaction between the wizarding world and the Muggle government would be quite complex. First, Harry would have to keep the wizarding world's secrets. He might create a special liaison team of wizards and witches who are well - versed in Muggle affairs to communicate with the Muggle government departments. For example, they could work on issues like preventing magical accidents in Muggle - populated areas. Second, he could introduce some magical concepts to improve Muggle life in a discreet way, like using magic to clean up environmental pollution without revealing magic's existence.
In this fanfiction, it could be that the prime minister has to work with Harry Potter to prevent a wizard from using magic to influence political decisions. Harry, with his knowledge of the wizarding world, would be the key to uncovering the plot. They might have some initial misunderstandings due to their different worlds, but eventually learn to cooperate. The prime minister could be amazed by the magical creatures Harry introduces to him, like a hippogriff or a phoenix, which would be a completely new experience for him.
One possible plot could be that the Prime Minister has to seek help from the wizarding world led by Harry Potter to deal with a dark magic threat that is seeping into the Muggle world. For example, strange magical creatures are starting to appear in London and causing chaos. Harry Potter and his friends then work with the Prime Minister's office to figure out a way to send these creatures back to their proper magical realm and also put up wards to prevent further incursions.
Sirius Black's family (before the whole dark turn). Imagine if Harry was fostered by the Blacks in a world where they hadn't gone down the dark path. He could have learned a lot about pure - blood wizarding traditions in a more positive light, and also had a family with a strong magical lineage.
One interesting fanfiction could be where the Prime Minister has to deal with a magical crisis in the Muggle world that is somehow connected to Hogwarts. Maybe the dark forces are using Muggle technology against the wizarding world and the Prime Minister has to work with the Ministry of Magic to stop it.