Hertis is a member of the Anti-Ori underground.
Tomin introduced him to Dr. Daniel Jackson and Vala Mal Doran while they were searching for the location of Ortus Mallum and the Ark of Truth. How Tomin, a former Ori Commander found him is unknown. He is the first to tell Vala and Daniel about the rumor that the Fires of Celestis have gone out which would confirm the death of the Ori and how the Priors believe it to be a sign the Ori are not pleased with the ongoing crusade against the people of the Milky Way. In order to prove to him what they believe they brought him aboard the Odyssey. He then told them that Ortus Mallum is believed to be located on a mountain near the Plains of Celestis on Celestis. (SG1: "The Ark of Truth")