A dark side adept is someone with the power to use the dark side of the Force outside of the traditions of the Jedi or the Sith. They were often steeped in the lore of the dark side and opposed to those who used the light side, such as Jedi. While all Sith were technically dark side adepts, non-Sith individuals such as Asajj Ventress, Kylo Ren, and the Grand Inquisitor were also considered dark side adepts. Dark side adepts were referenced in passing in James Luceno's canon novel "Tarkin".