Sylvia was just about to say something when suddenly, they heard the sound of a vehicle stopping outside of the building. And at that point, Sylvia said, "They are already here."
Jack did not say anything in response to that. Of course, his senses as a superhuman at the 5th stage of the superhuman level were obviously way above Sylvia's. So, he had already noticed that there was actually a car that had come to the building.
Since they came to this stronghold, the people that they had interacted her with were none other than Daniel and his sister Ivy. Other than them, there was this guy from the pandas organization craftsmanship department, Johnson.
As for the rest of the people, he really did not have much dealings with them. Of course, the people from the force organization were amongst the people that he had interacted with, but, there was nothing good that had occurred between them. So, there was definitely no reason for them to be coming to see him.