Former Jaffa turned trader, and former associate of Vala Mal Doran. Vala sold Inago a supposedly "priceless" necklace from a "royal dynasty," which was actually a necklace that belonged to the mother of another of her associates, Arlos.
Inago was once a Jaffa in the service of the Goa'uld, but following their defeat by the Replicators he became a trader to put food on the table. He has no known ties with the new Free Jaffa government that has arisen in the wake of the Goa'uld's destruction -- preferring to go it alone.
Inago swore that the next time he saw Vala he would kill her, but they both managed to survive the encounter when she returned a cargo ship power coil in return for the necklace.
The Ties That Bind - Vala goes to Inago to recover Arlos's necklace, but must retrieve his power coil first.