Ninja is a Job from Final Fantasy Tactics. They are the fastest Job in the game, and can equip two weapons at once. Their HP is limited, so they easily die if not supported. It costs 3,760 JP to master this Job in the original PlayStation version, and 3,960 JP in the Final Fantasy Tactics: The War of the Lions PlayStation Portable remake.
Mastering Ninja along with Knight, Lancer, Geomancer, Wizard, and Samurai, as well as having 20 kills with the unit (the defeated unit must crystallize or turn into a chest to count as a kill) will unlock the Dark Knight in the War of the Lions version.
The Ninja possess the highest C-EV (character evasion value) and speed of any standard class.