D nods in agreement with the potential of a trap. Just because the presence he sensed wasn't hostile, didn't mean they would remain unharmed.

"I won't ask you to stay behind, but if I am ahead try not to stand between me and myself. The rules in spaces like this are different, and vary by what made it, and why. A simple cut could vanish upon leaving, or cause long damage to your mind, or anything in between." Having said what he felt needed to be said, D turned towards the path again, prepared to set off if his companion of circumstance was ready once more.

Whether or not she chose to continue with didn't seem of much concern to him, and he clearly thought enough of her to make her own choice. Or perhaps he simply didn't care what happened to her, the line between respect for her capability and apathy for her fate was hard to discern. Except that he had cared at least enough to share information.