Robert Martin Klein (also known as R. Martin Klein or Bob Klein) (born May 11, 1957) is an American voice actor who went under the alias name Bob Marx in his earlier dubbing work during the '90s. He's best known for playing Me-Mania in Perfect Blue, Gomamon/Ikkakumon in Digimon: Digital Monsters, Fukurou in Noein & Katsuhiko Jinnai in El Hazard.

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https://en.wikipedia.org/wiki/R._Martin_Klein