Zach felt his heart skip a beat as there came a voice. Following Theo's leave - Merlin he was going to hike out of there almost at a run, if not one, if it were Rosier. But no, Zach forced his mind to think. It didn't sound like him. Rosier always had that...thing - annoying as it was - in his voice that affected Zach, no matter how scared he was. And he didn't feel that. But he still did not respond just then.
When Theo asked and Neville confirmed, Zach breathed a sigh of relief. How the hell was Neville Longbottom out of the wardrobe? Had someone freed him while Rosier was gone? Zach caught Theo's eye, trying to tell him he wasn't leaving. It wasn't Rosier, and bloody hell if Rosier was in there, that was insane. But he still kept slightly out of sight, so he wasn't immediately visible.