This Head Priest was a Jaffa Priest in the service of Apophis. He was among the Jaffa who guarded the Stargate on Chulak when a disguised SG-1 came through. He became suspicious of the group, but nevertheless let them pass after a brief interrogation. He eventually discovered the truth but had no time to tell anybody as he was killed by Bra'tac along with the other Jaffa guarding the gate. (SG1: "Bloodlines")