Regarding Anima:

Based on the design, Anima looks to be a creature that has been bound against its will. It also appears to be holding something that is presumably very valuable, since the same stone slab is visible on the artwork for the expansion itself. Since we learned that the mysterious towers are inhabited by beings bound within fleshy structures...I do find myself wondering if Anima is what remains of Hydaelyn, Zodiark or Venat. Such may not be the case, of course...but we'll see in Autumn!