<P> Dumbledore arrives at the hearing and convinces the Minister of Magic Cornelius Fudge to let Harry return to Hogwarts . At the school, Harry learns that Fudge has appointed a new Defence Against the Dark Arts professor: Dolores Umbridge . Umbridge is strict and abusive toward her students; she punishes Harry for his "lies" by forcing him to write the message "I must not tell lies" with a magic quill, scarring his hand . When Ron and Hermione notice Harry's scars, they are upset, but Harry refuses to go to Dumbledore, who has distanced himself from Harry since the summer . As Umbridge's control over the school increases, Ron and Hermione aid Harry in forming a secret group to train students in defensive spells, dubbed "Dumbledore's Army". Umbridge recruits the Slytherin students to expose the group . Meanwhile, Harry and Cho Chang develop romantic feelings for each other . </P> <P> Harry has a vision involving an attack upon Arthur Weasley, from the point of view of Arthur's attacker . Concerned that Voldemort will exploit this connection to Harry, Dumbledore instructs Severus Snape to give Harry Occlumency lessons to defend his mind from Voldemort's influence . The connection between Harry and Voldemort leads Harry to further isolate himself from his friends . Meanwhile, Bellatrix Lestrange, Sirius's deranged Death Eater cousin, escapes from Azkaban along with nine other Death Eaters . At Hogwarts, Umbridge and her Inquisitorial Squad expose Dumbledore's Army . Dumbledore escapes as Fudge orders his arrest . Umbridge becomes the new Headmistress . Harry's relationship with Cho falls apart, as he believes she betrayed herself to Umbridge . Harry discovers through Snape's memories why Snape disliked Harry's father James, who often ridiculed him . </P> <P> After the Weasley twins revolt against Umbridge, Harry has another vision, this one of Sirius being tortured by Voldemort . Harry, Ron and Hermione rush to Umbridge's fireplace to alert the Order via the Floo Network, since hers is the only fireplace not being monitored, but Umbridge stops them before they can do so . As Umbridge tortures Harry, Hermione tricks Umbridge into entering the Forbidden Forest in search of Dumbledore's "secret weapon". She and Harry lead her to the hiding place of Hagrid's giant half - brother, Grawp, only to be confronted by centaurs who kidnap Umbridge after she attacks and insults them . Harry, Hermione, Ron, Luna, Neville and Ginny travel to the Ministry of Magic on Thestrals in an attempt to save Sirius . </P> <P> The six enter the Department of Mysteries where they reveal a bottled prophecy, the object Voldemort was after . However, they are ambushed by Death Eaters, including Lucius Malfoy and Bellatrix Lestrange . Lucius reveals that Harry only saw a dream of Sirius being tortured; it was simply a ruse to lure Harry into the Death Eaters' grasp . Harry refuses to give Lucius the prophecy, and a battle between Dumbledore's Army and the Death Eaters ensues . The Death Eaters take everyone except Harry as hostages, threatening to kill them unless he surrenders the prophecy . </P>

Characters of harry potter and the order of phoenix