aaanyway, maybe she said AFOS, which is pronounced in japanese "A-FO-SU". Usually acronyms like ASS-1 get sounded out as they are in English, "A S S Wan".
Just finished downloading the ANBU-AonE version. Here they used the same word: "ASSU". And on re-listening, it really sounds like "A S S U". In Episode 2 there's a conversation between Aries and another scientist around 8:05, and where the scientist says "AFOS", he does say "A-FO-SU".
Oop, thanks for the reminder. I'll make sure to take a look ... listen... when I get home in an hour or so.