Astroganger

Astroganger (アストロガンガー Astroganga) is a Super Robot anime series created by Knack Productions. It consisted of 26 episodes and originally aired from October 4, 1972 to March 28, 1973.

Plot

An alien woman named Maya crash-lands on Earth. Her homeworld was destroyed by the Blasters, a cruel alien race who steals the natural resources from other planets. She falls in love with a scientist and gives birth to a human boy named Kantaro. When the Blasters invade the Earth, Kantaro must defeat them by fighting with Astroganger, a robot made from living metal.