Demon Hunter Mitsurugi Season 1 Episode 12 Operation: Exterminate the Scorpion Army ( Air Date 1973-03-26 ) Genre Action & Adventure, Sci-Fi & Fantasy category. Overview "Three ninja siblings, Ginga [Galaxy] Mitsurugi, Suisei [Comet] Mitsurugi, and Gekko [Moonlight] Mitsurugi, battle the alien warriors of the Scorpion Army.".