Amrosio was not in any state to desire conflict with potentially innocent children. So, he stayed hidden, keeping his presence as concealed as was reasonable given his equipment. He wanted to observe them and see if they would be hostile to him. If not, he might talk to them and ask about any path to the upper levels. Given their use of weapons not seeming to be fitted with a drain mechanism, they were unlikely to be revenants, so Ambrosio was especially cautious as humans tended to be skittish around revenants.

His body, due to his long time honing his muscles and physique, could handle all this crouching and hiding, but his desire to keep moving forward and acting ate away at his patience. He needed to stay still and not make a move, so he was in internal conflict between his nature and the practical aspects of his situation.