Ed and Mustang’s relationship is really funny because Ed thinks they’re in an equally-matched battle of wills and it’s a matter of time until his inevitable victory and Mustang thinks that it’s an unfair contest and also that he’s the winner and the truth of it is that both of them are losers because one of them is a thirty year old man in a years long feud with a teenager and the other one is a teenager whose second biggest preoccupation in life is getting one over on his boss