Gregole is one of the common types of Zoanoids created by Cronos in Guyver: The Bioboosted Armour. Developed at Cronos's Japan branch, Gregole is an enhanced muscle type Zoanoid. It is tall and has a reptilian appearance with green skin. It was designed to optimize physical strength and possesses 15 times the muscle power of an average human being. Gregole's skin is highly shock-absorbant and can easily shrug off bullets and other forced impacts. It also tends to lean forward most of the time; its thick neck extends forward so that it can deliver powerful attacks when charging with its horn. At full force, Gregole's horn can punch through armoured vehicles. The two tentacles growing out the back of its head function as balance regulators.

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