Quote Originally Posted by QT_Melon View Post
Then as far as summoners go the dialog mentions multiple people in the form of "they". Then you have the cave mural paintings.

We could take the theory that the life force was in account, but not the souls. Let's say since the Ancients can see souls that people who had given up their life force - may have given them the idea to sacrifice the mortal life force to bring their loved ones back? I mean it's an interesting trait that the Ancients can see the soul - so for those that lived for eternity may have been able to see a soul transcend after the lifeforce is gone?
?
It's apparently a pretty simple process to see the color of someone's soul, to the point that it's just part of one of the Alchemist storylines. Ancients can obviously see it without the need of alchemy and can probably better distinguish the hue, but it shouldn't be any more complex than Y'shtola's eyes after she used Flow the first time.