Quote Originally Posted by MeridaQ View Post
Yes you can you just have to have that class unlocked. The retainers as always can only level to the level of your current class and the starting weapons can be found in each main city that you originally got the class.
The retainers' max level on a certain class is the same as your level in that class. My botanist retainer is capped out at level 34 at the moment because that's the level I'm botanist at.