So, I've been pondering over this and trying to think of the best way to ask, because no matter how much I hunt around-- I can't seem to find the answer. So let us start with the first question - Garlean's Third Eye

My speculation by the equipment the Scions wear and Cid's "idle" joke to you, is that the Third eye can "see", but see in the way not like we "see". That said, the speculation is that Garlean's third eye allows them to maybe see the aetheric flow itself and that is why Gaius makes the comments he does in 1.0 when you and the scions faced him.

Maybe this is also why they can't use the aether, because somehow the gift in seeing it, prevents them from using it. However, I could be /way/ off and that is why I am /really/ curious as to what is up with the Third Eye.

(See next post for the Castrum, cause 1000 word limit is a pain)