A list of characters exclusive to Calvin & Hobbes: The Series. For characters seen in other Calvinverse stories, see the main character page.
open/close all folders
Brainstorm's sister who thinks Calvin's an alien.
Sheila's Distaff Counterpart to Jack.
Mother Brainstorm (maiden name Lightningstorm)
The mother of the above two Brainstorms.
The Lightning Man (aka Percy Lightningstorm
)A strange man who themes himself around electricity and knows a lot about Calvin and company. He's actually the uncle of Dr. Brainstorm (on his mother's side), whose knowledge of the heroes comes from their tendency to dominate Christmas dinner.
A Technopath that takes over Calvin's electronics three times.
After the real Retro was trapped on Galaxoid and Nebular's planet, he sent this hologram in his place.
Brainstorm's Chaotic Evil college rival that was freed by Shadow and managed to take over the world in the Season 3 finale (named after him to boot). In "Black Rain", he ends up freed by Shadow once more after getting re-frozen at the end of his first appearance.
A Killer Robot that was trapped in a chrome sphere and accidentally freed by a laser blast of Brainstorm's.
The Slender Man
Yes, really. The Slender Man plays a vital part in the final story of the series, "Black Rain". He stalks Socrates throughout, and eventually takes out Thunderstorm and Shadow, with heavy implications that he was on the side of good all along.
Debut: "Insanity is in the Air"
Voiced by: Jennifer Love HewittAndy's crush in "Insanity is in the Air". Unfortunately for Andy, though, she has a crush on Calvin instead of him.
The Klein Family
A family of Inexplicably Identical Individuals (named after their voice actor). The only adults Calvin considers "cool".