The potential threat was still quite a distance away, so no one on the island got prepared for battle immediately. The opposite, actually. To make sure they were able to bring out their complete strength, everyone who was going to fight made sure to rest and get in the proper mindset in preparation for the battle. If it really was like they feared, and they were being chased down by the same beast they suspected was behind the disappearance of every other void beast in the area, every last bit of preparation and readiness would help, even if all they could do was rest.
It was challenging relaxing and resting while anxiously awaiting the potential predator's arrival. Thankfully, they didn't have to force themselves to recover since they hadn't wasted any energy or gotten injured recently. And they didn't have to wait too long before the beast or beasts in the distance became visible.
