Zarin was a Tok'ra operative, serving undercover within Ba'al's ranks as the commander of one of his garrisons on P3S-114. Teal'c and M'zel traveled to the planet and allowed themselves to be captured in order to make contact with the Tok'ra through her. They believed that the Tok'ra were behind the deaths of millions of Jaffa on other worlds, but Zarin insisted the Tok'ra were not responsible.
It was, in fact, the Trust who were sending rockets carrying the symbiote poison through the stargate. P3S-114 was one of the targeted worlds, and the attack from a single rocket killed Zarin and every other Goa'uld, Tok'ra, and Jaffa on the planet.
Portrayed by: Brandy Ledford
Cross Reference: M'zel, P3S-114, Symbiote Poison, Tok'ra, Trust
Episode Reference: Endgame