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Characters: Calvin & Hobbes: The Series
A list of characters exclusive to Calvin & Hobbes: The Series. For characters seen in other Calvinverse stories, see the main character page.
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     Sheila Brainstorm 
Brainstorm's sister who thinks Calvin's an alien.


     Mother Brainstorm (maiden name Lightningstorm) 
The mother of the above two Brainstorms.
  • Big Eater: She once ate an entire turkey in a few bites.
  • Drill Sergeant Nasty: Has traits of this.
  • Mama Bear: Shows this in the final chapter of "Black Rain" when she finds out that her son and Jack are at the mercy of Thunderstorm, to the point where she stops eating and shouting after a tensionful pause.
  • No Indoor Voice

     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.

     Holographic Retro 
After the real Retro was trapped on Galaxoid and Nebular's planet, he sent this hologram in his place.

One of the monsters under Calvin's bed.

     Dr. Thunderstorm 
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.
  • Evil Counterpart: To Jack.
  • Family-Unfriendly Death: Is ambiguously killed by Slender Man at the end of "Black Rain".
  • Killer Robot
  • Knight of Cerebus: Remarked upon when he finds out how long he's been dormant in "Black Rain":
    If Shadow had been a normal part of this universe, he would have said something like, "No wonder I needed to stretch when I woke up this morning," or "I don't know why I bother with that alarm clock." But Shadow was not normal. He didn't understand the fine art of deadpan snarking. He was a humorless evil robot who only understood joy in the ways that his creator had programmed him years ago.
  • Me's a Crowd
  • Sealed Evil in a Can
  • Vile Villain, Saccharine Show: His abilities make him the most successful villain in the show, along with his master Dr. Thunderstorm.
  • Wall Crawl: He can also walk on the ceiling.

    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.


Voiced by: Jennifer Love Hewitt

Andy'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".
  • Competence Zone: As mentioned above, they're an aversion.
  • Inexplicably Identical Individuals
  • Motor Mouth: The Klein at the prank store listing the items the Prank Starter Kit contains in "Let Us Prank the Fool":
    "Well, we have your standards. We got your whoopee cushions, we got your squirting flowers, we got your spinning bowties, we got regular ties that roll up like noise-makers, we got your trick wires, we got pies, we got joy buzzers, we got silly string, we got condiments, we got fake gum, water balloons, disguises and mustaches and roller skates and fake hands and fake thumbs and fake toes and a fake nose and wigs and exploding figs and bending twigs and fake wings and ding-a-lings and loads and tons of other things! We got yo-yo's with invisible strings! We got sunglasses with songs to sing! We got dental floss and balls to toss, action Diana Ross! We got magnets and fragments and flip flops and garden crops! We got worms in a bag! We got a suit with a tag! We have also a TV that doesn't change channels! Air conditioners stocked from air from our air conditioned air condition factory!"
  • Tough Room: Averted with the Klein at the carnival; his jokes are apparently uproarious.

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