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|“||The word "defeat" doesn't exist in my computer memory!||„|
|~ Great Scientist Zaien quoting Great Professor Bias when he pays homage to for the Liveman tribute.|
Great Scientist Zaien is one of Space Empire Zangyack's top scientists.
A scientist in the employment of the Zangyack, he was a specialist at modifications, using his abilities to turn beings into cybernetic beings with no memories or concept of their former life or identity.
Zaien was the one who originally performed the operation that turned Sid, Joe Gibken's friend, into the deadly Zangyack cyborg Barizorg. His plan to assist the Zangyack with their conquest was to capture the greatest athletes of Earth and modify them into similar cyborgs, creating an army that would crush the Earth forces.
Though capturing several athletes, his attempt to capture a boxer was stopped by Joe and Ahim de Famille; while the siege upon his Earth headquarters was stopped by the entire Gokaiger team, first with the greater power of the Liveman, then by Joe taking him out with Cid's specialty move. After grown by his rival scientist Insarn, he is brought down by Hurricane Gokai-Oh.
- The voice actor for Zaien, Joji Nakata, is most notable for playing main Liveman villain Great Professor Bias. This is particularly notable given the episode is the Liveman tribute.
- This Action Commander greatly resemble Jinzo from the Yu-Gi-Oh! card game
Space Empire Zangyack
Black Cross Army