
As Gaspard suggested, being something of an "unofficial" white mage is perfectly fine and more or less what I've done with Faye to skirt around the issue.
 She's certainly not WHM material, but through diligence and pure stubbornness she's managed to tap into holy magic enough to cast something akin to the spell Holy. Otherwise, she's just your average conjurer, and not recognized by anyone--even herself--as a WHM.
