From that moment the battle intensified. Apparently, Goston was the one who controlled the monsters and when he was captured, the beasts became wilder and uncontrollable.
Zelfit asked Aldus, "Who wanted to open the door?", but Aldus' answer surprised Zelfit, "The moment he saw me arrive he took his own life without hesitating."
It was not abnormal for this type of behavior to be seen among people who do jobs like these, but that only happened after strict indoctrination and that took time.
For that reason, Zelfit and Aldus knew that they were not dealing with a simple enemy, since having the ability to train people willing to take their own lives before being captured was not something that someone without power could do, at least they did not believe that Goston was the mastermind behind this plan.