* CrazyAwesome: Dr. Dinosaur. He's an insane, MadScientist dinosaur who claims to have traveled through time and space to destroy humanity and make dinosaurs rule the Earth once more. He's also appears to be invincible having survived shootouts and fistfights with Robo, getting smacked full-tilt by an armored truck, and being close to a bunch of grenades exploding and taking out Robo. He spends his time doing things like shooting up 4th grade science fairs to steal a little girl's experiment, buying guns by using a children's picture book as ID, and trying to kill Atomic Robo for little to no reason.
* CrossesTheLineTwice: Half the stuff Dr. Dinosaur does.
* CrowningMomentOfHeartwarming: Thomas Edison, JerkAss and WellIntentionedExtremist though he may be, enjoying a quiet dinner with his wife in ''The Deadly Art of Science''.
** Also the reason why Edison started messing around with Odinic force in the first place [[spoiler: He was looking for a way they two of them could live together forever.]]
** From the same volume: every time Helen and Robo are together and Robo finally getting his own gun.
** Also: Robo brings Tesla soup.
* EnsembleDarkhorse: Jenkins and Dr. Dinosaur.