Yup! Riona is the chief of their nomad tribe and Ralucah is to be her successor one day.... that is, if she stops being a reckless, hard-headed, impulsive wild child. Riona just doesn't know what to do with Lucah sometimes.
Caiyah meets them early on in her travels bc she lives in the city behind the wall in the desert region. and they are nomads that live in the dangerous outer land, so yeah they meet eventually. They are a peaceful tribe to those who are peaceful with them.