Women fell into two categories for Caspian: those like his aunt and her handmaids and Susan Pevensie, this woman was neither. He actually swallowed hard before shaking his head and answering her. "No." Yes.
Backing up had likely been an error, now they were in the dark the light from the hall being the only source of illumination. There was also relatively no where for him to go now, close quarters as they were. The sword was brought around to the front and angled at her midsection. "Who are you. What do you want here?"
He'd put on the brave face, hide the nerves and the sleep-addled state of his mind. He had faced down an entire army, he could kill one woman if need be. "I will not ask again, who are you?"