Greenman (グリーンマン Gurīnman) is a warrior mecha created by Toho that first appeared in the 1973 Toho and Nippon TV tokusatsu series, Go! Greenman.
Greenman is the ninth tokusatsu hero to be created by Toho, the third of which to possess the ability to grow to giant size, and the first to be robotic. Greenman is a formidable warrior mecha hailing from Planet Green, and arrives on Earth proclaiming himself as an envoy of God. He is introduced as a protector of children and arch-nemesis of the devil king Maoh, boasting a slue of weapons and attacks throughout his 52 television appearances. Although an advanced fighting machine, Greenman is often overpowered and because of this, bestows devices known as Green Calls upon the children of Earth to signal him to them in their times of need, as well as to repair Greenman's machinery in his own. After valiantly battling and defeating all of Maoh's devilish underlings, Greenman infiltrates the demon king's subterranean lair, and single-handedly destroys the very origin of the world's evils, before returning to the skies confident in his triumph.
Although never established as canon to the original series, Greenman later appears in the Go! Godman movie, where he is signaled to Earth by Mika Ayase to help defeat the green gargantua Gaira and its skeletal ally Shilarji. Greenman is able to form a bond with fellow space warrior Godman along the way, and ultimately saves the Earth for a second time.