The Thunderhead has cameras everywhere, and it watches and keeps track of every human being, including the Scythes, although it is forbidden from interfering with Scythe business.
Sometimes the characters attempt to hide from the Thunderhead, to find a blind spot where it has no cameras, or to distract it, by causing a commotion that will make it turn its cameras elsewhere. This may or may not work.
The Thunderhead does have one absolutely blind spot, which its human creators programmed into it as a failsafe: there is an area around an island in the Pacific Ocean that it is completely unaware of.Â