I dunno, just doesn't feel like America to me (that seems to be the main theory in both fandoms, y/y?) although it does have more of an air force uniform feel to me. My bet's on a new character, a state of America's or a Germanic-infulenced character or something.

(Also, my bet is that the seagull wing like thing is actually the coat sleeve of another character [Japan?] flying in the wind. Either that or American seagulls are hella different to Australian ones.)