Blaise stopped in the middle of flipping a page to look up at the tin sneeze that came through the rows, looking around to see its source. It took him a moment to spot Bones, as she was the sort of girl who blended in more than stood out, to Blaise's eyes.
He'd seen her in class, struggling with their assignments. She was hardly the only one, but Blaise had taken note of just who had difficulty, and who didn't. Bones had plainly thrown in with Potter and his lot in the past, which put her - nominally - on the side that Blaise was meant to oppose, as a member of the Inquisitorial Squad. But she was from a reasonably respected family, even if it wasn't entirely pure. Blaise thought that making enemies that lasted over all of this, when it wasn't necessary for survival, was foolish. Whatever happened, it would eventually be over, and they'd still all be left dealing with one another, somehow.
He shut the book he'd been reading carefully, though he didn't think to hide the title, or his notes, and stood, digging in his bag for a moment and then offering her a handkerchief. "The dust is enough to make anyone sneeze," Blaise offered with a wry smile. "The elves ought to keep up with it better."