Heikichi Tsushima

The mighty robot Greenman, a self-described "envoy of God" who can grow to giant size and fire missiles from his chest, descends from space to do battle against Maoh's pawns.

Godman comes to Earth to fight against a force of foes that have come back from the dead.

A high-schooler involved in turn-of-the-decade student movements works to escape his comfort zone and apply himself.