apart from belonging to a vicious but honorable warrior clan known as the d'regs, he is later revealed to be the "wali" of klatch, a klatchian equivalent of a watchman on a par with vimes. it also turns out his obsessive clove-chewing and broken morporkian are in fact a disguise meant to delude foreigners into falsely assuming he is nothing but an uncivilized barbarian. like many privileged foreigners, he was sent to the assassins' guild as a child on the assumption that he would get an excellent education. he confounds vimes by his fond memories of ankh-morpork, and even cut-me-own-throat dibbler. he and vimes eventually develop a wary respect for each other, mostly based on both of them being basically honest cops in unenviable positions.