Blue emblem represents the Northern Sky, and red emblem is of the Southern Sky. While the sprites of knights from the Order of the Northern Sky and the Order of the Southern Sky use almost the same color scheme, they can be distinguished by examining the emblem color on the cape. Mastering the job as well as getting the jobs Samurai, Ninja, Geomancer, Black Mage, and Dragoon to level 8, and having 20 kills with the character (meaning the enemy is crystallized or dropped a treasure chest) is needed to unlock the Dark Knight job.
Leveling Knight to level 3 unlocks the Monk, leveling it to level 4 with Dragoon and Monk unlocks Samurai.
The Rend equipment abilities will fail against a target who has equipped the support ability Safeguard and will do damage equal to a normal attack if the target does not have the corresponding equipment. They are the first real physical job acquired, with abilities that focus mainly on disabling hume characters by lowering their stats or destroying their equipment. Knight is a job from Final Fantasy Tactics.
