Actarus - Grendizer

Duke Fleed (デューク・フリード?, Dyūku Furīdo) is the prince of Planet Fleed, which was invaded by the forces of the evil King Vega and rendered uninhabitable by radiation The kings of Fleed die in the attack, but Duke manages to escape with Goldrake and find refuge on Earth under the name Actarus (Daisuke Umon in the original Japanese version), posing as the son of Dr Procton (Genzo Umon), director of the Space Research Institute He begins to fight alongside Earthlings to defend his adopted planet, threatened by King Vega's troops, who have established a base on the Moon Commanding the robot Goldrake (Grendizer in the original), Duke Fleed manages to repel the enemy invasion, also thanks to the help of Earth pilot Koji Kabuto, who pilots a small flying saucer During periods of truce, he works as an employee on Rigel's farm (Danbei Makiba), thus interacting with his two children, the young Venusia (Hikaru) and little Mizar (Goro) Initially, only Dr Procton and Koji know Actarus's true identity, which is later discovered by Venusia, who then decides to join the fight by his side