At Providence Basic Training, EVOs were collared to prevent them from using their full power. When Rex was about to be sent into the Cage, Kenwyn purposely deactivated the collars, allowing most of the EVOs to escape from their cells.
Providence's goals and philosophy changed entirely after coming under the leadership of Black Knight. The collars were used to tame EVOs, causing them to obey every command of the controller. As demonstrated by Black Knight, the collars could also be deactivated remotely, causing the EVO to return to its previous nature.
It would appear that some upgrades had been made to the collars, which allowed them to be fired from machine guns to collar EVOs from a distance. Several Black Pawns used them in the attack on Abysus, turning the EVOs against their own people.
- When Rex does his curing sessions on EVOs, Providence also places collars on them.
- When Rex deactivates a control collar, it explodes.