Rattataki The Rattataki were a Near - Human species characterized by their chalk - white skin and bald heads . Virtually isolated from the rest of the galaxy , the Rattataki developed a violent society on their home planet of Rattatak , which involved extensive gladiatorial combat . Warrior Aidus and criminal Kaliyo Djannis were both Rattataki . The Nightsister and Dark Acolyte named Asajj Ventress was generally thought to be a Rattataki , while in fact she was a similar Zabrak - Human hybrid species called Dathomirian . History . The Rattataki were commonly thought to be descendants of a long - lost Republic expedition . While most other inhabitants of Rattatak came from the Unknown Regions , there were a significant number of off - worlder mercenaries who would come to Rattatak from time to time , likely to view or participate in gladiatorial combat , only to be stranded there permanently . The remarkably harsh conditions on the planet nearly drove its population to extinction . For eons , the Rattataki constantly battled amongst themselves and their fellow inhabitants ( represented primarily by Humans , Zabraks . Siniteens , Vollick , and Weequay ) over the planet ' s limited resources . Despite being nearly completely isolated from the outside galaxy , the Rattataki displayed remarkable initiative and continually created new ways to kill each other . Shortly after the Great Galactic War broke out , Sith Lord Darth Vich , upon noting the relatively - unknown Rattataki ' s considerable combat prowess and affinity for battle , captured hundreds of tribes of native Rattatki to forge them into his own personal army . Vich soon recognized that a number of these Rattataki showed sensitivity to the Force , and seeing the potential in this , trained many of these as Sith Acolyte s who would answer to him personally . Unsurprisingly , the Rattataki ' s natural abilities in battle were quickly manifest , and Vich ' s Army became a force to be reckoned with . This new - found power caused Darth Vich , who was eager for more sway in the Empire , to grow increasingly ambitious . This ultimately resulted in a failed power - grab known as Darth Vich ' s insurrection , after which most of his Rattataki forces were killed outright or enslaved . However , rumors persisted during the post war period that a small number of Vich ' s acolytes had defected during the failed insurrection , later being taken in by the Sith for full training . When many Rattataki warlords including the Siniteen criminal Hal ' Sted had gathered an army in the southern hemisphere to challenge Osika Kirske , a powerful Vollick warlord had them killed so they could never be a threat to him . Only one child , who was looked after by Hal ' Sted , named Asajj Ventress , escaped . Rattataki had no major contact with the Republic until a Jedi Knight , Ky Narec , crash - landed . The Jedi soon found the young Dathomirian Ventress , who had been living among the Rattataki , discovering her incredible potential to the Force . Together , they united armies and brought peace to the planet , until Kirske and some other warlords of the planet united to slay them , leading to the death of Narec , and causing Ventress to capture or kill their foes in a rage . Behind the scenes . Rattataki is a playable species for players who choose the Bounty Hunter , Imperial Agent and Sith Inquisitor classes in " " . Asajj Ventress was formerly Rattataki preceding a retcon in " " that altered her birthplace to Dathomir and her species Dathomirian , ironic considering the fact that she was the first " Rattataki " introduced into " Star Wars " canon . Leland Chee speculates that she may have shaved her head to better blend in on her adopted homeworld .