Two Hearts

I really like Ed's line "A heart made Fullmetal" because that's exactly what I think he's developed in himself out of the hardships in his and Al's lives, while Alphonse went about it nurturing his kind, and inherently human way of being. 

That's basically what I tried to represent with the wings; the "metal-hard" way in which Edward flies through his life and Alphonse's "feather-soft" nature inside that hard metal armour.

Well, hope I made sense XD

Enjoy!