Kosaa was a Tarasin woman, a member of the female gender, who resided on the planet of Cularin. Her life unfolded in the final years of the Galactic Republic era.
Kosaa functioned as a soldier within the [Wyrd], a collective of Tarasin witches who wielded the Force. Her specific role was to act as the dedicated protector of the Wyrd sister known as Naelora.
During the Clone Wars period, Kosaa found herself on Cularin. She was situated inside the primary dwelling of the village where the Zhadorii irstat dwelled. It was at this location that she and Naelora came under assault from the individuals known as the heroes of Cularin.
Within the narrative of Hunting the Wyrd, the specific Wyrd sister and her bodyguard encountered by the player characters within the central hut is subject to change, contingent upon the player's current level. Players of intermediate level will engage in combat with Naelora and Kosaa. Conversely, those at a higher level will instead face Torunin and Savina. Furthermore, players who have achieved an upper level will confront Baeshana and [Veshin]. It remains an option for players to bypass the hut entirely, implying that even those at higher levels may not necessarily have to battle Naelora and Kosaa.