This article is about a/an duo of villains in Kamen Rider Fourze.

Groundain and Skydain.

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.



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 GrounzelIcon-crosswikifrom Space Ironmen Kyodain.


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 SkyzelIcon-crosswiki from Space Ironmen Kyodain.

Behind the scenes

The Kyodain siblings are an homage to the original KyodainIcon-crosswiki brothers from the Space Ironmen KyodainIcon-crosswiki series, also created by Shotaro Ishinomori.



  • 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.

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