"Nono. You stay hidden."
Ayia waited for the officer to exit the loo by putting on a little hunch, leaning against the sink, and dropping her eyelids a little. She muted the communicator as the idiot prisoner apparently started yelling through it. There was still a little bit of blood across her shirt: a little dry for her tastes, but it would do. She stuck a knuckle into her nostril to complete the look.
The officer exited the loo, immediately catching Ayia's gaze, but ultimately dismissing her and moving to the sink.
"'Scuse me..." Ayia put on a bit of a falsetto. "D'you have... any napkins?"
"Do I..." She looked up, finally recognizing what situation Ayia was presumably in. "Oh, sure! Yeah, lemme just..."
The officer leaned down to pull up her satchel and start rummaging through it - just in time for Ayia to dart forwards with a tiny syringe and jam it into the officer's neck. It knocked her out instantly - and thank gods, too. For a moment there Ayia had worried it wouldn't work on their biology.
She turned the communicator back on. "Shut up, idiot. We're in a damn stealth operation here. Variance, can you change my voice?"