Villagers
From Against the Storm Official Wiki
Each villager has a Resolve stat. If it reaches above a certain threshold it will generate Resolve. If it falls to 0 the villager will leave, increasing the queen's Impatience.
Additional villagers can be obtained by completing Orders. A species' specialization will grant all villagers from that species a 10% chance to produce twice the amount of resources when working in a building related to their specialization.