Disclaimer: I don't own J.K. Rowling's universe, I just like to do really evil things with her characters, on occasion.
Chapter 5 - Occlumency
"What the /fuck/ was that?" Theo roared, as soon as the door to his office had closed, ensuring their privacy.
"A diversion," Blaise replied coolly.
"Did I /ask/ you for a fucking diversion? I'm bloody fucking positive I didn't see one in the mission statement for tonight's activities. Because I sure as hell would have said 'no' if I'd seen it!"
"It was improvised."
"Improvised? Since when do you improvise?" Theo glared at Blaise, and then glared harder. "Who are you covering for?"
"I'm sure I don't know what you mean."
"The fuck you don't." Theo took a deep breath, regaining control of himself, knowing the outright display of fury was never an effective means of dealing with Blaise. "I'm not going to ask you again, Blaise. Who is it?"
Blaise stared back at him, unblinking and silent.
"Are you really going to make me rip it out of your head?" Theo asked him quietly. "You don't actually think the protections you have on your mind are going to be any match for me, do you?"
"I'm willing to take my chances."
"Have it your way, then. Legilimens." Theo's voice was a mere whisper as he spoke the incantation, slipping into Blaise's mind with an ease that only came from repeated practice. Images assaulted him from every side, the first layer of defense, but he ignored them, focused on his goal. Blaise was a fairly accomplished Occlumens, and the Occlumency shield behind that wall of false images was a good one; Theo was better, though, and his spell shredded through Blaise's shield as though it were so much wet paper.
He heard Blaise make a pained sound, and he paused, maintaining his spell even as he pushed himself to ask aloud, "A name, Blaise? Let me assure you, the pain you've felt so far is nothing compared to what I can do to you."
"All right," Blaise said, his voice hoarse. "Goyle. It was Goyle."
The truth of his words reverberated through his mental landscape, and Theo retreated in shock. He spent a moment regaining his composure, heard Blaise beside him recovering from the assault, and then they were facing each other again. "Make it look like an accident," he finally said, before turning his back on his friend. For once, there was no complaint, no protest, simply compliance on Blaise's part, and Theo reflected that perhaps he should do this more often, if that was all it took to get Blaise to shut up.