The Kekkonshiki

Also known as "The Gray Men", they are a human subculture who prefer domination to coexistence. Their expertise lies in using technology to manipulate sentient minds, and they have manipulated both humans and aliens on a grand scale. Jim has experienced one of their techniques (in which a gray man agent seemingly severs his hands with an axe; this was an illusion). Jim has knowingly opposed them on two separate occasions (The Stainless Steel Rat's Revenge & The Stainless Steel Rat Wants You); however, during conversation it is revealed by Kome that prior to The Stainless Steel Rat Wants You Jim has in fact thwarted their plans twice already, making this their third encounter. The text can also be read to say that the second time he thwarted their plans was with the alien invasion so the third encounter also happened during The Stainless Steel Rat Wants You when Jim invaded their home planet. They live on a harsh, icy world; this existence forced them to eliminate all emotion from their culture. This society is also completely patriarchal, with women being treated as nothing more than property. (Incidentally, "Kekkonshiki" is the romanization of the Japanese word for "Marriage Ceremony")