If they sent anyone of value out by themselves with two low level guards to snoop the riverbed, they deserve to have that person executed. I have no doubt in my mind in and out of character that she's little more than a pawn to the Cult of the Dragon. There's nothing to indicate she is of value. I say we see what Governor Nighthill wants with her, but I will certainly be advocating her execution. Recurring enemies do not bode well for us as players, even if for the moment she's none too powerful. 

Say she escapes Greenest, [i]very[/i] likely given how damaged it is and how limited their milita and guardsmen are. She's bound to spread word of us and or recognize us if we ever go after the cult. The latter is less important because I imagine they are aware we are coming after tonight given those men escaped at the mill; they at least [i]know[/i] there's mercenaries in Greenest, or what seem to be all of a sudden. The dragon isn't likely to forget either.

But we do not need more loose ends.