Robetheri was a member of the Nightsister Clan on the planet of Dathomir. With pale skin and a bald head, Robetheri sported zigzagging tattoos around her eyes. Strong in the Force, Robetheri stood out among her sisters as an outstanding warrior on the battlefield commanding the members of the Nightsister Clan. From her success in combat, Robetheri dreamt of one day leading the Nightsisters and eventually conquering all the clans of Dathomir.