Gigi (sharing the same real name as Super Gee) was the daughter of Dr. Honda, scientist for Kawazake Industries and co-inventor of the GEE-2001, a high-tech motorcycle described as having "the firepower of a warplane and the intelligence of the smartest computer."
Once activated, Gigi is instantly transformed into the high-riding heroine Turbogirl. Vowing vengeance, she uses the GEE-2001 to battle the evil machinations of Dr. Gore.
Turbogirl's motorcycle, the GEE-2001, is equipped with various advanced gadgets and weaponry, and is also capable of flight. But the real source of her powers is the GEE-2001's control device, Turbo. Gigi transforms into her heroic alter-ego by pressing its button and shouting "Turbo!"
Turbogirl's arch-foe, a mad scientist who seeks world domination (yeah, that's original) through his twisted creations, the Monster Fighters.
A giant mechanized rat.
A nuclear-powered Monster Fighter, formerly the President of the "fictional" nation of Franciu (a reference to real-life French President Jacques Chirac, who was behind the controversial nuclear tests at the time). Seeking to bring the world to its knees, he asks Dr. Gore for the ultimate weapon. Instead, he turns him into one.
A diamond-based Monster Fighter, he can fire sharp diamond projectiles and roll himself into a super-hard diamond ball, but is vulnerable to high temperatures.
A Monster Fighter with the power to produce devastating hurricanes.