While the three demons of the beastmasters faction were not able to recognize the human woman caged inside of one of the two cages, they were extremely familiar with the demon trapped in the other, as well as the two dismembered corpses that were being transported by two of the five spatial platforms.
According to the memories of the commander, these three were the current leaders of just as many different families of demons.. all of which belonged to the disbanded faction called 'The Ungovernable Bunch'. Their individual power was only second to his own, and the strangeness of their presence here was only matched by the odd state they were presented to him.
From the way the two had been trapped, and the way in which the four corpses were being carelessly carried around, it didn't take for the commander to guess what had happened. The human that was sitting in such a carefree manner had probably captured the two, and killed the rest.