What does Harry see in the fire, what is her response and what is Corlath's response?

Harry sees a red-headed female leap from the flames, and the image grins at her in a friendly manner. The vision reaches for Harry and she reaches back, only to find herself reaching toward nothing, knee deep in the sand. Corlath picks her up gently as she weeps, and carries her to his tent, pity filling him as he promises himself to help her however he can.