Cris Tosiren, largely recognized by his acquaintances as Sot-sirc, was a Human male who first entered the world on the planet of Coruscant, specifically within the undercity, roughly forty years prior to the outbreak of the Clone Wars. Having only a handful of recollections of his mother and father, Tosiren was obligated from an early age to labor for slavers, spice traffickers, and religious devotees to ensure his continued existence, participating in smuggling and various acts of thievery. He started to nurture connections with a diverse array of people, so he could obtain sources of intelligence, and he adopted the practice of using prosthetic devices to alter his outward presentation.
As the Clone Wars unfolded, a HoloNet user going by the name of Ins1dr disseminated a communication across the HoloNet, asserting that Sot-sirc had at one time aided the felon Len Markus in his quest to unearth the Darkstaff, an immensely potent and age-old Sith artifact that Markus had come across in the Cularin system around 31 BBY. Ins1dr further stated that Sot-sirc had, in more recent times, made his way back to the Cularin system.