Area B is the current known fight. Area B has Mao's Dolls (But I believe not Mao as she is in Area A still?). Katherine & Ammy also just moved in to Area B and engaged the foes there. While the results of our actions haven't been verified by Os posting yet (because it is still our turn), it is incredibly likely that Area B is clear of hostiles after Katherine's & Ammy's assaults and Baha's breath weapon which blanketed most of Area B and no doubt cleaned up what was left.
Mao herself is indeed still in Area A.
As for Area B potentially being cleared this round... there was 3 pairs of warriors, a group of three marauders and one hidden marauder spawner.
Mao took out one pair of warriors, leaving 2. Kat landed a few hits with her counter on the hidden marauder.
Baham breaths a cone big enough in there to, perhaps, cover every enemy though she'd hit the drone and Kat as well. Perhaps also the drone scouts and the civilians at the end. Might possibly have forgotten to list his DC and turn cooldown before the next breath.
Kat then fullattacks the hiding marauder.
Ama runs around full attacking up to two groups of hostiles, perhaps finishing the hidden marauder and then fighting one of the two remaining pairs of warriors or going straight to one group of warriors, probably taking them out (her attacks should also ignore their miss chances thanks to Way of the Sword).
So there is probably at least one pair of warriors left.
Mao could use her turn to grapple what remains so they could perhaps be captured. Hoping they have to actually be be taken out to self destruct. Doubt it though.