HK-47. HK-47 was a Hunter-Killer assassin droid and Jedi hunter constructed by the Dark Lord of the Sith, Darth Revan, shortly after the end of the Mandalorian Wars in 3,960 BBY.
In the wake of widespread destruction caused by the Mass Shadow Generator, a superweapon used during the final battle of that conflict, Revan was inspired to seek more subtle methods of defeating his enemies. HK-47 was sent throughout the galaxy on his missions and successfully assassinated countless targets whom Revan had deemed threats to galactic stability and peace. Morrowind:Umbra Sword. Red vs. Blue: Episode 1: Why Are We Here?