For a moment, there's no response. The masked figure is just staring- presumably, it's rather hard to tell with the mask, admittedly- down at his green tinted hands. It's only when the moogle beside the robed figure holds clears his throat quietly, that Plague Knight startles to attention and looks around. "Eh! What? Oh! Ahem."

The alchemist's gaze settles on Finn, and he takes a deep breath. "Yes! Of course, hee! I am... Fine! Yes, nothing to worry about here, I just, ehee, needed some air, that's all!"