Vetter was Silk's (and Yarblek's) factor in Melcena. He was a Melcene with a narrow-faced intelligent man and a nervous tic in his left eyelid. Silk described him as "one of the best" and that "he gets things done and he never gets excited." Silk and Yarblek lured him away from Brador's secret police, and Silk mentioned "he has a good head for business and he's had all that training in the intelligence service."