Disclaimer: I don't own FMA. Someone much smarter and more talented then me does.
'Feather'
A/NI was told, Ed, Al, and feather. This is what popped into my head. Makes absolutely no sense, but sunstroke!Ed is great.
You know what?' Ed said one day in Rizembool, waiting for Winry to (once again) fix his arm so he could (once again) fix Al's armour.
'What?' said Alphonse tiredly. It was once again a boring, hot, tired day in the little town, and there was precious little you could do if a third of your body was missing and another third trapped in a wooden box.
'That hair thing on your helmet? It looks like a feather.' He answered, voice made drowsy from the heat.
Al stared at him. (Or the best a helmet could.) 'No, it doesn't.' he bit back defensively.
Ed shrugged, blowing a strand of hair out of his face. 'Whatever…
….and it so does.'