Quote Originally Posted by Sandpark View Post
Maybe the cutscene hinted at something else.

She looked arcanist class(with book) then she gives up the book to take up the sword and had no pet.

So maybe it is unlocked with arcanist and the job summons magical weapons instead of pets.
As much as I'd like them to revisit the class/job/job idea I doubt Arcanist is getting a third job.