Living Invid were encased within the armor and acted as foot soldiers and also filled in non-combatant roles such as Invid Hive maintenance. In urban settings, they acted in a policing role and responsible for both control and enforcement as part of their duties. There were at least two variations of the Soldier type with the common grey or black enforcers and the more elite red Soldier. Red Soldiers acted as a form of elite guard and field commander within the armies of the Regent. All the Soldiers are stage four Invid pilots. The pilots are intelligent and capable of making independent decisions unlike the Inorganics. In addition to "enforcing" the will of the Regent, the Soldiers are also used as technicians, surgeons, directors of slave camps, and operators of the Genesis Pit.