It seems like there has to be something extraordinary about her parentage here, how she was conceived despite the contraceptive. Her lighter skin also seems significant, heavily suggesting that her father is Norsirai. Maybe an exiled Dunyain or a Mangeacca agent?
A good point. Thing is, while it seems miraculous, we don't know the level of effectiveness that a whore's-shell provides. Even so, I can't imagine The Consult sent an agent to Esmenet, because when Aurang come to her the first time, he remarks that this is the "beggining of their relationship." I also doubt that there was another Dunyain on the loose that we never knew of.
My idea is that while her father is essentially no one, perhaps the fact that Fate allowed her to be born despite the contraceptive is what is key?
You know come to think of it: do we have even a remote understanding of why the Consult not only knows about Mimara, but commanded that she be protected? (which resulted in her being saved multiple times by not-Soma) We know what is told to the skin-spy about "even the false prophecies must be protected" but I don't buy that that's an honest answer from the Synthese; the Consult clearly knows something.
That's a question that has been bandied around for a long time. Where does the Consult get it's prophecies from? The answer is that we really have no idea. The closest we ever get to one is the quote from WLW, Chapter 12's opening:
Skies are upended, poured as milk into the tar of night. Cities become pits for fire. The last of the wicked stand with the last of the righteous, lamenting the same woe. One Hundred and Forty-Four Thousand, they shall be called, for this is their tally, the very number of doom.
—Anonymous, The Third Revelation of Ganus the Blind
But my guess is this is second hand. That is, this is news of the prophecy, a portend given on the eve of the First Apocalypse, not what surned on the Inchoroi in the first place.