Ssi held a position as one of the most exalted gods within the religious framework of the Ssi-ruuvi. The sacred text of the Ssi-ruuvi, known as the G'nnoch, states that Ssi and P'w'itthki emerged from the initial, primeval egg. Conversely, Ssi's descendants originated from the subsequent egg.
Ultimately, Ssi and P'w'itthki engaged in conflict, which resulted in Ssi's victory. Ssi permitted the progeny of P'w'itthki to survive, but only under the stipulation that they would serve Ssi's descendants for the remainder of time. This event marked the genesis of the Ssi-ruu (the descendants of Ssi) and their enslaved people, the P'w'ecks (the descendants of P'w'itthki).