Original Amon art scans (cropped) from the Japanese Art of Eorzea book.
The translated description at the bottom is pretty interesting:
Since we were unable to use human bones due to various issues, I added cloth to his goggles to hide his face. In FFXIV, Amon is a rather psychotic character, and Scylla is one of his victims. (Tsukamoto)
I also like the height comparison and a look at all the little details of his design. Wish I knew what the rest of it says!
Also proof that his mask had built in ear covers. I’ve been debating that with Scylla for a bit.