Harry Potter: The protagonist, facing the growing threat of Voldemort and the Ministry's denial of his return. He struggles with the loss of his godfather, Sirius Black, and the pressure of leading a rebellion against the Ministry.
Hermione Granger: Harry's best friend, facing her own challenges with the Ministry's denial of the truth. She continues to be brilliant and resourceful, helping Harry and Ron navigate the dangers ahead.
Ron Weasley: Harry's other best friend, struggling with his own insecurities and anxieties. He stands by Harry and Hermione, but his loyalty is tested when his family is targeted by the Ministry.
Albus Dumbledore: The headmaster of Hogwarts and a powerful wizard, actively working against Voldemort and guiding Harry. He continues to be a mentor and confidante to Harry, providing crucial advice and support.
Sirius Black: Harry's godfather, tragically killed in the previous book. He is present in flashbacks and his death greatly impacts Harry's emotional state throughout the book.
Remus Lupin: Harry's former Defense Against the Dark Arts teacher, a member of the Order of the Phoenix and a close friend of Sirius. He plays a pivotal role in guiding Harry and confronting the Ministry's lies.
Nymphadora Tonks: A member of the Order of the Phoenix and a skilled Auror, she becomes romantically involved with Remus Lupin. She is a fierce and loyal ally to Harry and his friends.
Severus Snape: The Potions Master at Hogwarts, his true loyalties are unclear but he plays a crucial role in the story. He shows a complex relationship with Harry, hinting at past secrets and future implications.
Minerva McGonagall: The Deputy Headmistress of Hogwarts and a powerful witch, she remains a staunch supporter of Harry and Dumbledore.
Arthur Weasley: Ron's father, a dedicated member of the Order of the Phoenix and a strong supporter of Harry. He works tirelessly to protect his family and fight against Voldemort.
Molly Weasley: Ron's mother, a loving and fiercely protective matriarch. She is a constant source of comfort and support for Harry.
Bellatrix Lestrange: Voldemort's most loyal Death Eater, a dangerous and sadistic witch who poses a constant threat to Harry and his friends.
Dolores Umbridge: The new Defense Against the Dark Arts teacher, appointed by the Ministry, who is actually a double agent for Voldemort. She is cruel, manipulative, and seeks to undermine Dumbledore and Harry.
Cornellius Fudge: The Minister of Magic, in denial about Voldemort's return. He attempts to discredit Harry and Dumbledore, leading to increased danger and chaos.
These characters, along with other important figures like Luna Lovegood, Neville Longbottom, and Cho Chang, play significant roles in the events of Harry Potter and the Order of the Phoenix. They contribute to the complex plot, emotional depth, and overall impact of the book.