Purifier droid

Purifier droid was a type of droid designed by Iokath species to serve as security on their artifical world of Iokath. The species went extinct following the Iokath civil war and Purifier droids were repurposed by ARIES into the combat units, aggressive to any intruders.

Behind the scenes
Purifier droids appear in Star Wars: The Old Republic: Knights of the Eternal Throne as emenies on Iokath.