"There are colors humans can't see, but I can. Color is a spectrum, with reds and blacks being the lowest of what humans can see and violets and whites being the highest. What you see as white or black, I see as reds or purples or greens. When you heat up a piece of metal and see it turn red, I see it red even earlier, because I can see below the spectrum you do." Sorry, Guts, Alia's got a tendency to over explain, even if she's simplifying. "Certain bodily fluids leave stains. For example-" Ugh. And here her face flushes a little. "Some sexual fluids."

She'll just let him color that in. And see if he fetches the gloves now, while she squats over the briefcase and spins the numbers, noting where she feels the snag and hears the clicks of tumblers falling into place before she pops it open. After all, what harm could there be in a briefcase?