The Klystron are a humanoid species, which have distinctive foreheads divided into two hemispheres (which seem to be bones). The species includes twins that together form two halves of one being, in something of a symbiotic relationship. If one twin dies, the other twin will anguish in the loss of "self". They are typically known for being a quarrelsome people. Some Klystron live in Earth space and are employed as mercenaries.