Why would anyone have mentioned it earlier? The characters only see her appearance and actions while she is in range without any further backstory or inner monologue (and cannot make the same deductions as we, thusly), and there hasn't been much OoC talk about her. 

...Hmm. And now I can't recall what I actually wanted to ask. Ah well, back to waiting for a collab-post and writing a longpost that would probably start a war for another RP.