Selina watched the Array cover up the area and block her sight. Making it impossible for her to see into it.
The Horst scions had left the moment they were out of the entrapment. They were most probably heading out of the Forest at that moment with no thought in their mind to inform others of the danger lurking.
At least not until THEY were safe.
The Krasts still stood in front of the array because Arnold, the de facto leader had not yet left and they would follow his lead and wait for his call.
As long as it did not unnecessarily put them in harm's way of course
Arnold on the other hand would not leave without Selina who was once again ignoring him despite him having alerted her to the urgency of their situation and how there could be other Assailants nearby.
Selina gazed at the Array and groaned,
"Bastard, what's he trying to hide?"
Despite the words, Arnold almost thought he detected a hint of concern.