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The Space Ironmen Kyodain (宇宙鉄人キョーダイン, Uchū Tetsujin Kyōdain) siblings from space who plan on protecting the Earth.
Kyodain[]
Groundain[]
- Main article: Groundain

Groundain (グランダイン, Gurandain) is the blue car-like older brother of the Kyodain. To begin his act of treason against humanity, he rushes to complete the military satellite weapon: the XVII. He is armed with a powerful cannon built into his chest called the Grounbuster X (グランバスターX, Guranbasutā Ekkusu). Groundain is an homage to Grounzelfrom Space Ironmen Kyodain.
Skydain[]
- Main article: Skydain

Skydain (スカイダイン, Sukaidain) is the red jet-like younger sister of the Kyodain. Like her brother, she gains her own personality and wants to rebel against humanity. She is armed with built-in blades in her arms. Skydain is an homage to Skyzel from Space Ironmen Kyodain.
Behind the scenes[]
The Kyodain siblings are an homage to the original Kyodain brothers from the Space Ironmen Kyodain
series, also created by Shotaro Ishinomori.
Gallery[]

Notes[]
- In the original series, Skyzel is the older brother and Grounzel is the younger brother.
External Links[]
For information on the 1976 versions of the characters see Space Ironmen Kyodain in Wikipedia.