Experiment AA-20 is one of the first specimens created as part of the Traders Union of the 5 Circles of Cosmerrium's secretive program of genetic manipulation. The lone survivor of the AA batch of experiments, AA-20 has proven to be a nearly perfect thrall to the T.U.5.C.C. Science Officers who gave him life. AA-20 is intelligent, resilient, creative, ruthless, and above all - totally compliant to the commands of his T.U.5.C.C. overseers. Often utilized in the extermination of failed experiments, AA-20 has recently been sent out in search of a number of experimental creations which escaped the confines of the T.U.5.C.C. labs. AA-20's mission is to hunt down and neutralize these escapees before evidence of the Traders Union's illegal practices can be discovered by the Phaeroxx authorities.