The Muggle Prime Minister of Britain

This fictional character, equivalent to the real Prime Minister of Britain, receives a visit from Cornelius Fudge and Rufus Scrimgeour in the opening chapter of Harry Potter and the Half-Blood Prince. Using a series of flashbacks, Rowling describes how the Prime Minister is aware of the existence of a wizarding world, through several meetings with Fudge that include his first night as Prime Minister, the night in which Sirius Black escaped from Azkaban, the notification of the incident in the Quidditch World Cup and the announcement of the importation of dragons and a sphinx for the Triwizard Tournament, and finally the Azkaban mass breakout from the fifth book. Rowling intended to include the Prime Minister scene in earlier books, but she thought that it could not properly fit until the sixth book.[24]
On the first page of Harry Potter and the Half-Blood Prince, the Prime Minister recalls his day, during which one of his political opponents had been criticising him and his government for several catastrophes that happened in Britain. Readers discover a little later during the discussion with Fudge, that these catastrophes were, in fact, the doings of Lord Voldemort and his followers. He also discovers that he is protected by an Auror who now works in his office, Kingsley Shacklebolt. It is unclear how he fared during Voldemort's takeover of the Ministry of Magic, when he had no such protection.