Psi-Stalkers were a Human-like species native to the planet El Dorado. They had bald heads, chalky white skin, and had internal organs different from those of true humans. Psi-Stalkers had the ability to use the Force. They were friendly to Dog Boys, but as part of the Coalition Worlds were treated as second-class citizens both due to their non-human status and their Force abilities. They were often closely monitored by the government controlled by House Prosek in order to make sure they did not engage in crime.
Psi-Stalkers were employed within the Galactic Republic as bounty hunters and mercenaries, but with the rise of the Galactic Empire, they were persecuted as Force users. Even so, they found employment with criminal syndicates, Hutt-dominated, Black Sun, and Zanns Consortium.