Master Assassin was a title denoted an assassin at the top of their field. For example, the title was held by the most skilled assassins in the Assassin's Guild. As part of the Fett gotra, Fennec Shand also held the title while she was the lieutenant of Boba Fett during the New Republic Era. Prior to entering the service of Emperor Sheev Palpatine, Ochi was a Master Assassin in the Assassin's Guild.