Ern admittedly felt quite awkward at this point, as he wasn't very familiar with Percy, but at the same time would feel like a terrible person just to leave him as is.
"Well, the nightmares are rather terrible. You're not alone on the matter. Just try not to worry yourself too much over this. It's troublesome, but hopefully this would be resolved soon." He paused for a moment before asking. "Would it help you to speak of it?"