Raymond S. Patrick Seitz is the English dub voice of Sloth in Fullmetal Alchemist: Brotherhood, and Fumihiko Tachiki is the Japanese voice. . Fumihiko Tachiki (立木 文彦, Tachiki Fumihiko, born April 29, ) is a Japanese voice actor, live-action actor, and narrator. Persi voices the character of Flash in Disney's Zootopia, the fastest sloth in the Dmv (Department of Mammal Vehicles), but he's no ordinary voice actor. Persi voices the character of Flash in Disney's Zootopia, the fastest sloth in the Dmv (Department of Mammal Vehicles), but he's no ordinary.