For some reason Kobayashi had failed to answer his question about the supposed shapeshifting patient, but Castiel got the feeling that had been due to him getting distracted rather than because he was being purposefully evasive. He didn't have much faith in them having reached the right room, seeing how it had taken his roommate a few minutes to get them here.

He seemed confident enough now, but Castiel decided not to say anything either way. If it turned out that he was being led on some sort of wild goose chase, that would become clear as soon as the door opened.

Crossing his arms over his chest (an action he did carefully, considering he was holding a blade in one hand), Castiel simply waited.