Every class has it's own class based weapons and armor. While doing your playthrough of each dungeon you will aquire weapons and armor for each of the classes. While in the dungeons you will come across chests this is one of the few times where items are player class specific. The other times where this bears true is in Nexus and when completing missions. There are class specific specialty shops in the market area of Nexus where weapons and armor can be purchased and sold.