I think we can eliminate both Ekur and Enki as Enki was (until his departure) heavily invested in finding a way to physically recover the uploads. Political / psychological manipulation wouldn’t be relevant to him until later. Most of the other Cobalts would appear to either lack the skill or the motivation to brain wipe rather than kill. Unless our Author is planing to introduce another, previously un-hinted at, character this late in the story (which would be aesthetically a bit tacky), we are down to Tobalkin or some aspect thereof, Dumuzi or some aspect thereof (I never trust white hats) or the clock-tower AI(s?). Any of them could be using her as an intelligence gathering tool.
Some of the most successful AI programs we have today incorporate random function generators as part of their basic structure. If the clock-towers do the same, ‘why’ may just as easily be ‘why not’.
It sure was, I typo’d the living hell out of that name. I’m fixing it now that I am home from work.
(And, why did Adah reappear on Star Fall?)