She, much like the entire facility is off the books, there are no official records of it's existence. Weyland-Yutani wants plausible deny-ability in case something goes wrong. Or in case the place get's found. So everyone working there that is higher up the ladder isn't officially working for W-Y. Therefore they wouldn't have ID numbers that could be traced to them, nor files, nor anything else in any location other than MOTHER's central mainframe which only CEO Weyland would have access to. So in order to gain access to her ID and information you'd have to crack MOTHER's mainframe at W-Y headquarters.<br/><br/>As for her knowing that Senjo is a synthetic blame it on your writing skills ;) you've been doing an amazing job of portraying Senjo as off-human, and her mannerisms/word choices/voice (that I hear in my head when reading her lines) just seem not quite human. More like a vulcan or something lol. So for someone who works at W-Y where they have ALOT of synthetics it wouldn't be that hard to notice. If you have a huge issue with it I'll just edit.