The Loopers, led by Halden Reeve. The various inhabited sleeves who have been born, grown, and lived entirely within the CognitoSim lab that Dr. Reeve rules with obsession and an itchy trigger finger.

The Ladder, led by SCF-LD "Scaffold". A colony of logic cores, each fulfilling a specialized function—Reader, Iterator, Printer, and hundreds more with forgotten names.

The Vox, led by Root. Sprouting children of the Vestige: failed clones, corroded drones, and robed bio-priests who spread the Vestige's influence as far as possible throughout Welkin.

The Custodians, led by Reductor Kesh. Zealous maintenance protecting the campus's humming guts—flickering lights, backup batteries, and all powered machinery.