Vexa, a Tusken Raider of the female persuasion, belonged to the same tribal group under the leadership of Sliven. Her animosity towards Sliven stemmed from his decision to integrate a Human girl, Tahiri Veila, into their tribe back in 16 ABY. Despite her resentment, Vexa permitted Tahiri's inclusion and Sliven's continued leadership, contingent upon Tahiri's participation in a week-long survival trial in the Dune Sea at the age of nine, devoid of sustenance and hydration.
Consequently, upon Tahiri's return from the Jedi Praxeum alongside Anakin Solo in 22 ABY, she faced this very challenge. The two Jedi triumphed, owing to their developing abilities in the Force. Ultimately, Sliven retained his position as the tribe's leader.