However, there are other significant antagonists who act on his behalf or represent his ideology:
* Dolores Umbridge: The Minister of Magic's appointed High Inquisitor of Hogwarts, Umbridge actively undermines Dumbledore and Harry, imposing strict and oppressive rules. She represents the Ministry's ignorance and fear of Voldemort, and embodies the Ministry's attempts to suppress the truth.
* The Ministry of Magic: While not a single character, the Ministry serves as a powerful antagonist, denying the return of Voldemort and actively trying to silence anyone who speaks about him. This leads to the creation of a climate of fear and censorship.
* The Death Eaters: Voldemort's followers are actively causing trouble, making the world more dangerous for Harry and his friends. While not the primary antagonist, they are a constant threat.
Therefore, while Voldemort is the ultimate antagonist, the book explores the struggle against his ideology and the forces that support it through various characters and institutions.