He follows him, his steps right behind his. Curious as to what he's going to see, he kneels next to the stranger as bid.

The little vine seems such a stark contrast to the rest of this place. Prompto almost reaches out to touch it, but refrains, fearing damaging it in some way.

"...if you're trying to say what I think you're saying, then thank you." He glances over at him, offering a smile. "How did you know this was here? I wouldn't think anything would grow in this place."