The Unifiers, known also as the Scarlet Riders or Scarlet Runners according to Kerra Holt, were Sith adepts who donned red uniforms and were in service to the Dyarchy. This Sith state was situated within the Grumani sector during the era of the Republic Dark Age. These Unifiers were particularly skilled in applying Force persuasion, though their proficiency with other Force powers was not as great. Instructions were given to them by the Krevaaki Sith Lord, Saaj Calician, using a telepathic network of Celegians. They then employed their Force abilities to generate a Force persuasion haze, which dulled the minds of the Dyarchy's non-Force-sensitive populace, ensuring the Dyarchy maintained complete control over its subjects.