This has been irking me for a few days now. The concept art shown below depicts
Hein, not
Amon. The color scheme is clearly that of Hein, and Hein has a backstory where Amon does not. Notice how the Amon page only gives a simple boss strategy, whereas Hein has a story section. I've played FFIII multiple times and can attest to its accuracy.
http://static2.finalfantasyxiv.com/a...UkkCbYRRxc.png
Edit: It doesn't matter if you think he's Amon because of ties to the Crystal Tower. Amon is nothing more than a pallet swap of Hein.