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Groundain (グランダイン, Gurandain) is one of the two main antagonists of Kamen Rider Fourze The Movie: Everyone! Let's Feel the Universe! alongside his younger sister Skydain. He assumed the human identity of Harumi Saeba (冴葉 晴海, Saeba Harumi), the general manager of OSTO Legacy.
History[]
Groundain was created along with the other Space Ironmen by Professor Blink. However he and his sister Skydain went rogue and attacked the professor. The professor siphoned their power and kept them sealed within the Space Core. In order to get their powers back and start their plan, Groundain posed as the general manager, Harumi Saeba of OSTO Legacy and recruited the Kamen Rider Club to deal with Black Knight and Inga Blink and power down XVII. With the Space Core powered down, the Kyodain regained their forms and attacked the Club before going on with their plan to use XVII to destroy humanity.
Kamen Rider Fourze in Cosmicstates managed to stop their plan by warping the orbital laser back at XVII, ceasing its functions. The Kyodain then attack the powered down Fourze and Meteor. When it seemed hopeless, Fourze gained the power of the Fusion Switch and Fusionstates. The Kyodain assumed their vehicle forms as Fourze rode on his Machine Massigler, before Fourze made the finishing blow with Fusionstates' Limit Break, destroying the Kyodain.
Super Hero Taisen Z[]

Groundain revived as a member of Space Shocker.
The Kyodain are later revived as members of Space Shocker. However, due to their sense of honor and desire to fight Gavan, the two are destroyed by Space Ika Devil for acting against their cause. [Kamen Rider × Super Sentai × Space Sheriff: Super Hero Taisen Z]
Forms[]

Groundain
- Statistics
- Height: 234 cm
- Weight: 232 kg
Behind the Scenes[]
Portrayal[]
Concept Art[]
Groundain was designed by Kia Asamiya (麻宮 騎亜, Asamiya Ki'a).
Notes[]
- Groundain is an homage to Grounzel
from Space Ironmen Kyodain
.