I had an idea for an arch rival for my character. The Plastique Mystique!  A snooty Frenchmen who has control over plastics. He is a crafty and evasive sort of villian who commits crime for the fun of it. Incredibly intelligent and consistently outsmarts Magnastar, getting away with their crimes. The few times she has been able to capture him, he either gets off on a technicality, gets released for lack of evidence, or outright escapes!

Just a thought about a villian you might use. I leave the rest in your capable hands, oh GM!