HK-series assassin droid

"Statement: I see you have purchased me, master. A satisfactory arrangement. Am I to accompany you now? Shall I kill something for you?"

- HK-47 to Revan

HK droids were assassin droids with the language functions of protocol droids. They were originally manufactured by Czerka Corporation, disguised as protocol droids with their assassination functions concealed.

The earliest such droid was HK-01, responsible for the Great Droid Revolution on Coruscant. HK-01 was finally destroyed by the Jedi Arca Jeth.

HK-47 was made by Revan right when the Mandalorian Wars ended. The Mass Shadow Generator influenced him in that seeing the mass destruction caused at Malachor V at the hands of the Jedi Exile made Revan realize that mass slaughter was not needed.

Years later, G0-T0 started making HK-50 droids, designed to hunt down Jedi.

Known units

 * HK-01
 * HK-24
 * HK-47
 * HK-50
 * HK-51
 * HK-58 Aurek
 * HK-58 Besh
 * HK-77

Behind the scenes
The term HK was first used in Star Wars with HK-47, which in turn is a reference to the dropship of the same designation that appears in the BioWare game Shattered Steel, which in turn was a reference to Bioware writer Drew Karpyshyn's billiard team. 

Appearances

 * Star Wars Knights of the Old Republic: Days of Fear
 * Star Wars Knights of the Old Republic: Nights of Anger
 * Star Wars: Knights of the Old Republic
 * Star Wars: Knights of the Old Republic II: The Sith Lords
 * Star Wars Galaxies: Trials of Obi-Wan