The werewolves camp's mission was only one: to annihilate 500 guests in the next seven days. It meant that at least 72 people on average had to die everyday so they could fill the quota. However, the number of people killed on the first day was only 38. If Lu Yizhou excluded the two people he had personally killed as well as Liu Shi who died of poisoning yesterday, then last night only 35 werewolves acted.
Assuming that there were 50 werewolves on this ship, then what about the remaining 15? Were they like the girl he had met in the labyrinth last night? Burdened by conscience and guilt, they chose to abstain and bear the consequences in the end?
Of course, that was only Lu Yizhou's speculation. He still had no idea how many werewolves were there in the cruise ship.