If you only want to hear the original story, you should watch the first 25 episode of FullMetal Alchemist first, then start the entire FullMetal Alchemist Brotherhood series. Do not skip the first 10 episodes of FMA Brotherhood either because there are some very slight changes that were made within those 10 episodes.Who is the strongest Alchemist in Fullmetal Alchemist?
ROY MUSTANG. He is the strongest and smartest alchemist in the country who uses his power only to protect the civilians. His sole mission is to become the next Fuhrer of the country. By doing so, he encountered many events of which he has to sacrifices something more important.