In her CANON-canon she's just a civilian merchant who inherited the business after her husband's death lol
(class: wife; job: merchant)

As for the WoLmond AU...canon, she's a white mage - which she sort of stumbled into following the conjurer questline story linearly (the whole help Sylphie > help the Padjal perform the Quieting > become WHM line).
She picked up VERY basic conjury reading books she'd managed to get her paws on about the subject - eventually traveling over to Gridania to learn it properly.
She's got a sick-but-stable grandmother (thanks to a combination of conjury and medicine) and was interested in the idea of learning to help others in a similar situation.