Rythus, a Petrusian of male gender, was employed at the Imperial outpost located on Kullgroon. Following the Galactic Empire's act of enslaving the outpost's workforce, Rythus reached out to his daughter, Kristiss. He communicated to her that the stormtrooper security detail would be changing shifts in a mere three days, and that despite their limited numbers, the enslaved individuals possessed the potential to overpower the troopers and achieve liberation.