The Vassila are an industrial alien species native to Vassilan who evolved from fish millions of years ago and became amphibians.
100 years ago, they formed an alliance with the Agrippa. The Agrippa gave the Vassila desperately needed food, and in return they gave the Agrippa drones to help build their houses.
The Vassila are evolutionary cousins of the Agrippa, and as such share some of their characteristics. However, Vassila look and behave much more like humans than their counterparts do.