Guiron

Guiron was a large, knife-headed monster who was the guardian of the planet Terra. Following the destruction of Terra by Space Gyaos, Guiron, along with his owners Florabella and Barbarella, was one of only three surviving Terrans. His main job was to guard their base from the Space Gyaos, and he would take sadistic pleasure in cutting them apart. When Gamera arrived to rescue the Earth boys Akio and Tom, and fought Guiron and although severely injured by him, ultimately defeated and destroyed the knife-headed beast.