Once the player's party has arrived at Goug Machine City in Chapter 2, they can buy guns for Chemists to enhance their offensive capability. It costs 5,140 JP to master this job. Leveling Chemist up to level 2 unlocks White Mage and Black Mage, leveling it to level 6 with Squire unlocks Onion Knight, and mastering this job along with Orator, Summoner, Geomancer, Squire, and Dragoon unlocks Dark Knight.