Quarsian

The Quarsians are aliens that experts in constructing androids. (DWBIT: The Diamonds of Sartor, Quarsian Mission, Android of Death)

Biology
They resemble clumsy upright walking blobs with two eyes which are on top of protruding stalks.

Technology
Their androids varied from simple 'storm trooper' soldiers, to robotic facsimile copies of people. The pirate's ship is powered by Zortron energy, a huge amount of which is stored in the ship's engine rooms.

History
A group of Quarsian pirates have raided the colony of Sartor, intending to plunder its diamonds to harness the powerful but bulkey Zortron energy which powers their ships.(DWBIT: The Diamonds of Sartor, Quarsian Mission, Android of Death)