"If this is a foolish prank-"
"-It's not...sir."
Severus narrowed his eyes. He'd suspected someone of brewing Polyjuice, what with his missing lacewing flies. Still, to have actually surprised that paranoid bastard...
"The imposter?"
The girl glanced at Nott - an interesting pair - before raising her eyes to meet his own, and Severus could see her shields lower (a natural Occlumens, dangerous) followed by a clear image of Crouch Jr.
Shock. "How did-a Seer?"
Nott nodded, the girl, strangly, kept quiet.
"Who else knows?"
"Daphne, Harry so probably Ron and Hermione, Sirius, and...you?"
"You stupid child!"