Thier are four major clans in the Zidian empire. Each controls a fourth of the empire, has a seat on the ruling council, and is responsible for a specific area of society.
Clan Guntaru are the main armed forces. They control most of the armored assets and most of the infantry. They are the first to encounter Humans, and as such are the stereotypical Zidians.
Clan Druft are the main naval forces. They control most starships and fighters. They were encountered second, and tend to be calmer and more willing to think than the Guntaru.
Clan Hosut are the traders. They are more interested in money than the other Clans, but it is still somewhat hard to trust someone who would gladly sell you a razor and then slit your throat with it.
Clan Stebal are the scientists. They are in control of the new military technologies, but most other clans dislike them for not being as travelly and aggressive as the other clans.
this four clan plan was layed out by Zidia herself, so as to strengthen her chosen through specialization.