The experimentee can say several things about the pair, unfortunately very little of it actually identifying. At least not easily or consistently. Yes, a Morgoth tattoo would be a bit identifying on a human, moreso than short brown hair, but on the back of the thighs is a hard place to look at casually. A black ork with glowing blonde hair would be easy to find if it wasn't because of filament hair. That stuff is identifying, but the purpose of it is to change and glow in all kinds of colors.<br/><br/>There's several other things, but absent catching their faces on the way out or getting to examine a whole lot of people nude or nearly so, the descriptions aren't going to be doing much identifying. The book might, but that's only if they turn to the shadows to make a recovery of stolen property instead of the police corps. And obviously, the woman insists that she'll be fine if she can just leave. The doubting of that statement is almost palpable.