A Sue tracker is a device used to monitor the more Suvian agents, be they ex-Sues or agents dangerously close to becoming Sues. Trackers seem to be able to be programmed to do a number of things, from simply alerting the agent that they are close to using Sue powers, to acting as a power dampener. It can be assumed that the trackers are also used to monitor an agent's location. Trackers tend to take the form of a metal bracelet or anklet, and typically can't be unlocked without authorization. Agents Diocletian, the Aviator, and Shamrock Alsike are known to be fitted with Sue trackers.