Severus opens it. He'd taken one look at himself in the mirror, swallowed his pride, and turned his jumper (a very dark) crimson to help with the looking-half-dead thing. He feels better, really, but he looks like he hasn't eaten or slept... ever. All the apparating around, no doubt, and the strain of taking tests he hadn't studied for in decades. "Quin? Come in. I hope you hadn't been by earlier this week; I've been out."