Starman

Origin
Starman was a genetically modified creature (possibly android) created by the benevolent aliens from the Planet Emerald to protect Humanity from the onslaught of alien threats as well as humanities own suicidal gamble with Nuclear weapons.

His first assignment for Earth was to stop the evil Western nation of Metropol causing a Nuclear Holocaust to wipe out humanity to which he barely won out due to the Leader of Metropol's arrogance.

He fought other threats such as the Warrior Spherion Aliens from using a human built spaceship and its creator to wipe out humanity, fighting off the Salamander Men from the Planet Kulimon whom wanted to exterminate humanity. One of his most perilous missions was to stop the rogue Alien Brain of Balazar and his monster minions from Zemarians from using various supercharged nuclear weapons capable of destroying Earth and the surrounding Planets but after intense fighting and the aid of the chemist Dr. Sakurai managed to wipe out the forces of Balazar and kill him with acid.

Powers and Abilties
Starman was shown to be brave and caring of humanity, especially children whom he often looked after and protected. He was shown to be powerful, with his only true weakness was a certain chemical that Balazar produced and infected on one of his alien servants hand which with a single strike could somehow kill Starman. Oddly enough, even though he travels on Earth in a disguise, his identity is well known on Earth and he and the humans call him Starman.

Trivia
Originally starring in a Japanese film Serial known as Super Giant (スーパージャイアンツ Sūpā Jaiantsu), Starman can be considered the First live action Japanese film hero. In 1964 Walter Manley Enterprises Inc. Bought the rights to the films to make 4 compilation films out of them. The copyright in the US was not renewed for any of the films and thus is considered Public Domain outside of Japan.

Public Domain Appearances
Atomic Rulers of the World (1964)

Attack from Space (1964)

Evil Brain from Outer Space (1964)

Invaders from Space (1965)