"Who are you?" That's directed at York. If this were literally any other time, perhaps his introduction wouldn't be so curt, threaded with fear, but--

nothing is convenient right now, it seems. "I've never been down this far before. Or down here. Period." It should come as no surprise that he's talking to fill up the silence and the darkness, unwilling-- or afraid-- to use his healing magic's glow to lighten the place up. "Our eyeglasses don't work down here." He's just tried. There's a new note of panic in his voice, and he abruptly stops talking to fiddle with the now-useless communicator.