"Did you invite someone to stay in our room?"  He takes a few steps of running start and sock-slides up to the other one, lightly bumping shoulders.

"I didn't!  Why do you ask?"

"Well, there was someone in our room when I went up," gesture, "and I don't know who she is!"

"I can pick a name but it might not be the same name as mine if I pick a name at the same time."

"I don't know what you mean by that but by all means pick one anyways!"

"How about Rubelite?"

"Okay!  Is that anyone we know of - I think I would definitely remember if anyone was gemstones but if it's the consonants or whatever -"

"I mean, if it's explicitly a just-chosen alias - oh, are you the," he turns to Rubelite, puts two fingers out in a V parallel to the ground, and rotates his wrist back and forth, swapping the positions of the fingers repeatedly, "the, not very odd, Céline Daaé's one?"

"I have absolutely no idea what that question means!"

The first guy is bouncing.  "We're mutually putting each other in that situation kind of suspiciously a lot!"

"I wasn't suspicious about it and still kind of am not."

"I'm suspicious that either something very strange is happening or you're pretending that it is so you can rob or seduce or otherwise act nefariously towards us, but I'm leaning enough toward the former to ask whether you have any way to demonstrate evidence that you're not human!  - Also now it's two on one and we're close enough to other people that if you attack us they'll hear - but mostly I'm really hoping you're actually weird!"

"All my implants are internal and I don't know if you have a way to scan me."

"How big are they and what are they made of?"

"They are of different sizes and mostly silicon and various alloys."

"Those should show up on the BJG, right -"

   "Yeah, definitely."

"Could still be - wasn't there that case last year with the lady with the prosthetics -"

   "It would probably at least rule out a basic robbery - and it's a portable unit; we don't have to go near the really valuable stuff -"

"Sure."

"- Sorry, we've been terribly rude; will you spit in this?"  They're back in a more densely decorated area; he swipes a geometrically painted ceramic dish off the wall and holds it in her direction.

"Huh! I don't think I've ever spit before. I will try if you want."

"I would appreciate it!  Do you know what it is enough to try?"

"Yes." She works her mouth a bit, leans over the vessel, and issues some spit into it.

"Thanks!  I'll go get the scanner."  He heads off in his original direction, carrying the dish.

"Are you from very far down in the world?"

"No."

"I think people probably would have noticed if you were moving between the celestial bodies we know of, if you were doing it for any length of time."