The Tarasin, a sentient species originating from the planet Cularin, designated their tribal leaders with the title Irstat-Kes. Within each Tarasin irstat, or tribal group, an Irstat-Kes presided, typically the second oldest female member. The term Irstat-Kes signified "tribal leader," and while not mandatory, the majority of Irstat-Kes possessed abilities as Force Adepts.
Cryalira of the Hiironi irstat held the position of Irstat-Kes, as did Mir'Liss for the Jaraana irstat.