The can-toi, or low men are a race of humanlike creatures that are the result of human/taheen interspecies mating, generally exhibiting "the most undesirable characteristics of both species".
Characteristics and Description
Unlike the taheen, which have the heads of various animals, the can-toi always have the heads of deformed rats. They have extremely poor hygiene, many being infested with fleas and lice, and many carry diseases such as rabies. Their teeth grow constantly, but are worn down by constant chewing.
The can-toi seem to possess an oddly ambivalent attitude toward humankind, both idolizing and mocking its culture at the same time. Their religion states that the can-toi will replace humans once the Dark Tower falls. Because of this, the can-toi wear synthetic human masks, made from a living latex that is grown by them, which they believe is their first step to becoming human. These masks have bleeding red holes on the forehead for breathing purposes, which are described as always welling up but never actually bleeding. These red holes may 'dry up' depending on which world they are in.
Their clothing is garish, usually consisting of vibrant colors and clashing patterns. When "Earthside" they tend to get around by driving replicas of classic American cars. The can-toi also have a practice of adopting names from American pop culture once they reach adulthood, with occasionally absurd results.
They serve two functions in their service to the Crimson King: as guards at Algul Siento, and as trackers. Their role as guards at Devar-Toi appears to be mostly in subservience to their Taheen supervisors. As trackers, they seem to be allowed greater autonomy as they direct and carry out missions as varied as the capture or recapture of escaped Breakers (like Ted Brautigan), the recruitment of new "talent" (like Dinky Earnshaw), or the hunting of enemies of the Crimson King (like Donald Callahan).
The can-toi methodology in these pursuits conforms to their overall absurdist take on human culture. They communicate to their targets via lost pet posters and obscene graffiti.
A pair of can-toi wearing mustard-colored dusters and pins bearing the red-eye sigul of the Crimson King visited Wesley Smith in November of 2009 in order to confiscate a mis-delivered Amazon Kindle that Smith had used to alter the future of his own world.