G4 Volta is a Redgun mech pilot active on the planet Rubicon 3 during the Coral War. Due to his belligerent attitude, he and G5 Iguazu are being disciplined by their CO: G1 Michigan. Both he and Iguazu made a pact of punching the living daylights out of Michigan and leave the Redguns for good, but eventually, Volta saw this as impossible and resigned himself to learning about business from G3 Wu Huahai. Volta's mech, CANNON HEAD, is a green/red heavy tank-leg type with explosives and a shotgun.