Roy Mustang is waiting.
It is always what he does when they leave, when He leaves.
Roy Mustang is waiting.
He looks down at his matches, unable to bring himself to do alchemy with Him somewhere, not needing him anymore. After all, He was why he didn't retire long ago, wanting to be alone with his demons and his memorys.
Roy Mustang is waiting.
It doesn't matter to him that who he is waiting for may never come back, that there is no chance of him having his feelings returned, even if he does come back.
Now all he wants is his Fullmetal shrimp home.
So Roy Mustang was waiting.