In English his voice actor is David Vincent. In Japanese his voice actor is Masaki Terasoma.
The English voice actor is David Hayter. And his Japanese voice actor is Akio Ootsuka.
The Japanese voice actor for Roy Mustang is Shinichiro Miki and the English voice actor is Travis Willingham.
In the Japanese the voice actor is Kensuke Nishi and in the English the voice actor is Paul Dobson,
His voice actor in Japanese is Mayumi Asano and his voice actor in English is Susan Dalian.
Pete Capella is the English voice actor while Daisuke Ono is the Japanese.
In English, America's voice actor is Eric Vale. In Japanese, America's voice actor is Katsuyuki Konishi.
In the Japanese version Kae Araki was the voice actor for Miaka Yuuki, in the English version Ruby Marlowe was the voice actor for Miaka Yuuki.
In Japanese Toshiro is voiced by Romi Paku, and in English he's voiced by Steve Staley. :)
Koji Yusa
The voice of Grimlock was portrayed by two different voice actors. The English voice actor that played Grimlock was Gregg Berger while the Japanese voice actor was Takuro Kitagawa.
The voice actor (or Seiyū in Japanese) for Suigetsu Hozuki is: Japanese: Takashi Kondō English: Grant George