Lockhart's office

Lockhart's office is the private domain of Gilderoy Lockhart, the newly appointed Defense Against the Dark Arts teacher at Hogwarts, and functions as a theater of narcissistic performance, a site of supernatural revelation, and the stage for the fraud's final collapse. It is here that Harry Potter, serving a detention, first hears the murderous, bodiless voice of the basilisk—a voice no one else can hear—and here that the diary of Tom Riddle, the enchanted object through which Ginny Weasley is possessed, is later found. The office ultimately becomes the place where Lockhart's entire career of stolen glory is exposed and where his attempt to erase Harry's and Ron's memories backfires, leaving him a vacant, amnesiac shell.

Appearance and Atmosphere

Lockhart's office is a space of aggressive self-celebration. When Harry enters for his detention, he finds the walls covered with countless framed photographs of Lockhart, many of them signed, shining brightly by the light of many candles. Another large pile of signed photos lies on the desk, ready for mailing to fans. The room is lit by candles that burn lower and lower as the hours pass, making the light dance over the many moving faces of Lockhart watching Harry from the walls. The atmosphere is claustrophobic and oppressive, a shrine to a single ego, and Harry spends nearly four hours there addressing envelopes to Lockhart's admirers, his hand aching as he writes out addresses like Veronica Smethley's.

The Voice in the Walls

During that detention, as the candles gutter and Lockhart prattles on about his fame, Harry hears something that shatters the room's mundane vanity: a voice of breathtaking, ice-cold venom that says, "Come… come to me… Let me rip you… Let me tear you… Let me kill you…" Harry jumps, spilling ink, and asks Lockhart if he heard it. Lockhart, puzzled, denies hearing anything, attributing Harry's reaction to drowsiness. This moment marks the first time Harry hears the basilisk's voice, a sound that will lead him to the Chamber of Secrets, and it establishes the office as a threshold between the ordinary and the monstrous.

The Diary and the Confession

Months later, after the basilisk has been slain and Ginny Weasley rescued, the office becomes the setting for the final unraveling of the mystery. Harry, Ron, Ginny, and the memory-wiped Lockhart stand before Dumbledore, and Harry places the destroyed diary on the desk. It is here that Dumbledore reveals that the diary belonged to Tom Riddle, who was Lord Voldemort, and that it was the instrument of Ginny's possession. The office, once a temple to Lockhart's fraudulent fame, now hosts the truth about the real villain.

The Unmasking of Lockhart

Earlier, the office is the scene of Lockhart's complete exposure. When Harry and Ron come to him for help after Ginny is taken, they find the room almost completely stripped: two large trunks stand open, robes hastily folded into one, books jumbled into the other, and the photographs that had covered the walls crammed into boxes on the desk. Lockhart is packing to flee. Confronted, he admits that his books are lies—that he tracked down the real heroes, put Memory Charms on them, and took credit for their deeds. He then tries to cast Obliviate on Harry and Ron with Ron's broken wand, but the wand backfires, and the spell hits Lockhart himself. The office, which had been a monument to his fabricated heroism, becomes the site where his memory is erased, leaving him a harmless, smiling man who no longer knows who he is.