Tleilaxu:
Led by a small council of Tleilaxu Masters - the fanatic, xenophobic Tleilaxu were tolerated because of their useful genetic engineering superiority. Although underestimated and loathed by others, they hoped to someday dominate all.
Ixian:
The cyborg, Prince Rhombur of House Vernius, leads the Ixians, masters of manufacturing and technologies only they know how to deploy.