Quick answer — Masashi Hironaka voices Siegfried Kircheis in Legend of the Galactic Heroes, Christof Sievernich in Monster, Rock in Fist of the North Star 2.
Masashi Hironaka voices Siegfried Kircheis (Legend of the Galactic Heroes), Christof Sievernich (Monster), Rock (Fist of the North Star 2).
Siegfried Kircheis is voiced in Japanese by Masashi Hironaka.
