She is one of the wives of Chief Burguk, along with Gharol, the Forge-Wife, and Shel. She is the Hunts-Wife, it being her job to provide the stronghold with food and skins. She also has a son, Nagrub, who is also a hunter.
According to dialogue, Arob is proud to be one of the chief's wives, and considers him to be a good and strong ruler. She is possibly his first wife, as her son is an adult.