Great Professor Bias Leader of Volt Believes in no one but himself and controls his trio of officers with the allure of evil science. Looks down upon the Earth and its inhabitants with contempt aboard the orbiting space station Brainbase.

Doctor Kempu/Beauty Beast Kempu (1-35) Fearbeast Kempu (36-46) Formerly Tsukikata Kenji, Yuusuke's rival at Academia.

Doctor Mazenda (1-37) Machine Mazenda (38-47) Robo Mazenda (47) Formerly Senda Rui, Megumi's rival at Academia.

Doctor Obular (1-21) Formerly Omura Gou, Jou's rival at Academia. Has an inferior complex that led him to become the monster Obular. Eventually quit Volt. (Note how their new names are derived from their surnames.)

Doctor Ashura (12-46) and the Shurer Three (14-46) Formerly Busujima Arashi, underworld figure, who became a super genius after receiving an evil education from Bias. Gained the ability to 'Cyber Body Split' and generate the Shurer Three.

Guardnoid Gash Bias' robot bodyguard, who wields the Gigaphantom monster-enlarging cannon

Gildos of Gild Green Robot secretly built by Bias to spur on three doctors

Butchy of Chibuchi Orange piglike robot secretly built by Bias to spur on three doctors

Jinmers Green-skinned android soldiers with mohawk 'haircuts'.

Brainbase Orbiting space station headquarters of Volt.