Az-Harto, commonly called "Ranger", was an Olog-hai who was rescued from a group of Uruks surprisingly by Ratbag himself. Since then they eventually took over a fortress and became an Overlord of Nurnen. They built up a reputation of being "The Etten", a two-headed troll, to be intimidating and rule the other Uruks and Ologs.
Talion arrived and took control of the fortress prompting Az-Harto and Ratbag to leave. Az-Harto speaks mainly in Black Speech but can speak common when he chooses to. He was captured by Brûz the Chopper as a means to exact revenge against Talion, but after a series of traps he was rescued by Ratbag and Talion who then left together after seeing what became of Brûz.