For those who are ignoring the Spoiler warning and are not that far into HW, Unukalahai is the one who gives you the Bismark and Ravana EX fights.

Here is my question though: Who, or rather what, is Unukalhai?
They wear a white mask and robe, so we can't see any facial features.
They are the size of a Hyurian child, yet they do not have any visible horns like the Padjal of Gridania.

To go even further is the name, Unukalhai.
Unukalhai is the brightest star in the constellation Serpens.
Serpens is the snake portion of the constellation Ophiuchus, a.k.a. the constellation Zodiark is based off of in the Ivalice Alliance games.

Could Unukalhai be connected to the Ascians, Elidibus, and/or Zodiark?