The Great Leader commands the antagonistic alliance Gran Shocker, uniting villainous factions like Shocker, Gel-Shocker, Destron, and the Crisis Empire. This entity manifests as a towering stone giant mecha, featuring a prominent, independently moving eye at its waist that tracks targets. A caped figure operates the controls within the mecha's forehead compartment, initially presented as the core identity.

Gran Shocker functions as a coordinated villainous legion under this leadership. The organization utilizes blue-and-yellow uniformed foot soldiers called Sentonin, characterized by comedic roles and high-pitched vocal traits. Operational commands include directly dispatching kaijin such as Spider Man on missions, like capturing global athletes.

A narrative revelation identifies the caped pilot as Doctor Shinigami, a former high-ranking executive from the original Shocker hierarchy, establishing a continuity link by repurposing the known subordinate into the supreme antagonist role. The stone mecha body serves as both control interface and combat platform, its composition providing substantial durability against opposition forces.

The portrayal emphasizes exaggerated traits consistent with the super-deformed aesthetic, contrasting with live-action gravitas through heightened comedic elements. This includes idiosyncratic behaviors among high-ranking subordinates and the visual absurdity of the colossal mecha design.