

Once transformed, the Sires became mindless, feral, and violent. The ancestors of the Locust Horde were Sires, human children ill with Rustlung and mutated by Imulsion and the DNA of indigenous creatures of the Hollow by Doctor Niles Samson in order to cure them. Other than transforming them into more soldiers for their army, to act as laborers, or to feed to the Locust beasts - it seemed that the Locust tortured the humans out of pure hatred for them as they found joy in inflicting pain onto humans.

It is unknown why the Locust torture humans, as they don't seem to require information. Human prisoners were transported using Torture Barges, which could house the prisoners and torture them. Human prisoners were housed in various Locust citadels and bases around the Inner Hollow, but most were taken to the capital city of Nexus. The process involved a prisoner being chained down while a device cut under the left tear duct and scraped away brain matter of the frontal lobe, resulting in the prisoner becoming a mindless slave to the Locust Horde. There were various methods to torture, but all methods led to the final act of lobotomy. Those who were not transformed by Locust scientist Ukkon into Drones, enslaved into a labor camps, or fed to the Hollow creatures - were tortured. In the years before Emergence Day, the Locust Horde had captured thousands of humans.
