That is Krile, a new unique npc who was one of the background members of the Scions of Dawn and mentioned in hearsay. She has pulled some design inspiration from the Seer Job in previous FF works, but there is no official word it will be an actual class in the game or if Krile will even be a caster (although it is likely). Chances are no for the class. Class/job npcs are generally not important msq npcs too. That's why our ninjas aren't trained by Thancred or Yugiri.

We may however get the glamour for the robe.