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Characters / Caillou

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Voiced by: Bryn McAuley (1997-2000); Jaclyn Linetsky (2000-2003); Annie Bovaird (2003-2010); Logan Nicholson (CGI specials and 2023 reboot)

Meet Caillou, He's cute and funny at the same time. Caillou is a 4-year (3 in some season one episodes) old boy, and the main character and main protagonist of his TV series. His interests include cars and dinosaurs.

  • Adaptational Karma: The reboot actually has a few episodes where he gets punished for acting like a brat.
  • Aesop Amnesia: In the earlier episodes, he tends to forget that the world doesn't revolve around him.
  • Attention Whore: Occasionally, but most notably in "Big Brother Caillou", wherein he pinches Rosie just because she got more attention than he did.
  • Big "NO!": Has a tendency to let these out whenever angry or upset.
  • Bratty Half-Pint: Depending on the Writer. In some episodes he's bratty while in other's he's cheerful.
  • Characterization Marches On: Infamously, Calliou was originally a spoiled brat that whined if something didn't go his way. However, around season 3 or 4, this side of him was toned down, and he became more of an imaginative and naïve child curious about the world around him. Of course, that didn't stop people from remembering him for how unlikable he once was.
  • Charlie Brown Baldness: He's only 4 and completely bald. This is because he was originally a 9-month old baby in the books, and looked unrecognizable with hair.
  • Cheerful Child: It depends on the writer, though.
  • Cool Big Bro: Whenever he and Rosie aren't fighting.
  • Depending on the Writer: He's either a Nice Guy with a big heart or a brat who throws tantrums.
  • Does Not Like Spam: He doesn't like the taste of olives. This is the main premise of a Season 5 episode where he struggles to tell his grandma to stop feeding him olive-based foods since he doesn't like olives.
  • Hair-Trigger Temper: In some episodes in the older seasons, he can get really angry and throw tantrums over petty stuff like not getting to go to the circus on the day he thought it was or when Rosie was wearing his teddy bear shirt.
  • Heterosexual Life-Partners: With Leo.
  • Hypocritical Humor: In "Caillou Joins The Circus", he says this moments after throwing a tantrum about the circus.
    "No! I don't want to make duckies, that's for babies!"
  • Innocently Insensitive: In the earlier episodes, he can do things that he doesn't realize are rude or selfish, thankfully, he grows out of it.
  • Intergenerational Friendship: With Mr. Hinkle.
  • It's All About Me: In the earlier episodes, he can be really bratty & self-centered if things did not go his way.
  • I Want My Mommy!: He has a tendency to yell out for his mom if something bad happens in the earlier episodes.
  • Karma Houdini: His parents frequently don't discipline or even scold him for misbehaving.
  • Large Ham: Whenever he's throwing a fit.
  • Masculine Girl, Feminine Boy: A platonic example with Sarah. Caillou is less athletic then Sarah and cries somewhat more then she does.
  • Meaningful Name: His name means "pebble" in French.
  • Mr. Imagination: He developed into one in the fourth season, though these segments were discontinued in the fifth season.
  • The Napoleon: He's small in height and can be a brat at times, in the older episodes at least.
  • Only One Name: His last name is never revealed.
  • Prone to Tears: Good Lord, what doesn't make him cry? (Thought he started to cry less after season two.)
  • Rail Enthusiast: He loves trains like Boris and his grandfather.
  • Sensitive Guy and Manly Man: With Leo. He cries somewhat more than Leo does.
  • Small Name, Big Ego: In older episodes, he can act selfish at times, believing everything revolves around him.
  • Spoiled Brat: At times. He grows out of this the later seasons.
  • Took a Level in Kindness: In the first season, he can be pretty whiny and bratty at times. In the second and third seasons, his bratty side was toned down, and he had more nicer moments with his family and friends. In the fourth season, all his flaws disappeared and he was an complete Nice Guy in every episode. In the fifth season, though, he can act rather selfish at times but it would usually be unintentional and he would get over it pretty quick and was still a nice kid overall.
  • Unwanted Assistance: Tends to refuse help from his parents to show that he can do it himself

Voiced by: Brigid Tierney; Jesse Vinet; Christian Churchill (CGI specials and 2023 reboot)

Meet Caillou’s little sister, Rosie! At 2 years old, Rosie is a giggly little girl who loves to play tricks on her big brother. She also loves playing with Caillou who helps her navigate the big world ahead of her.

Voiced by: Pat Fry; Tyrone Savage (CGI specials and 2023 reboot)

Meet Caillou’s Dad, Boris! Caillou loves to help his dad fix things around the house or have fun at the park. Caillou can always count on his dad to be goofy while learning important life lessons.

Voiced by: Jennifer Seguin; Stephany Seki (CGI specials and 2023 reboot)

Meet Caillou’s Mom, Doris! Although some know her in the workplace as Doris, she’s known as Mommy in Caillou’s household. Caillou loves to help his Mommy with grocery shopping and running errands – they even love to bake and do arts and crafts together!

Caillou’s toy dinosaur, who is curious about everything and is full of energy.

Caillou’s Teddy Bear, who used to belong to his daddy. Teddy loves to hug and play with his best pals, Rexy and Gilbert.
  • A Lizard Named "Liz": He's a Teddy Bear, and he's called Teddy.
  • Beary Friendly: A kind-hearted and mild-mannered Teddy Bear.
  • Cool Old Guy: He's older than Rexy and Gilbert but he's still nice and fun-loving.
  • Deadpan Snarker: Whenever Rexy goes overboard when they’re pretending.
  • Nice Guy: He’s as cuddly as Teddy Bears come.
  • Sad Clown: During his more gloomy moments, such when Caillou forgot to take him on vacation or feeling that he might get a different bear.
  • Suddenly Voiced: In the puppet segments.
  • Wide-Eyed Idealist: He once tried to fly around the neighborhood.

Meet Caillou’s cat Gilbert! Gilbert likes playing Hide n Seek or Dinosaur Hunter, but most of all he loves curling up with Caillou and Rosie at naptime! He also loves to teach Rexy new things and write poems in his spare time.

Supporting Cast

Voiced by: Pauline Little

Meet Caillou’s Grandma! Grandma loves to garden and spend time outdoors! She is always showing Caillou creative ways to overcome challenges but especially loves painting & gardening with her favorite grandson!

Voiced by: George Morris

Meet Caillou’s Grandpa! Grandpa always takes Caillou on fun adventures – like fishing, riding the bus through town and camping! He is Caillou’s Daddy’s father and loves telling Caillou stories about his dad when he was little.

    Mr. Hinkle
Mr. Hinkle is a nice and kind old man who lives right next door to Caillou. He likes having fun with Caillou and Rosie and is also good friends with Caillou's Daddy and Caillou's mommy. Caillou visits him sometimes. He is a (second) grandfather figure to Caillou and Rosie.


Voiced by: Johanne Garneau (1997-2003); Vince Davies (Caillou's Holiday Movie); Jonathan Koensgen (2006-2008); Graeme Jokic (2010); Lucien Duncan-Reid (CGI specials and 2023 reboot)

Meet Caillou’s Best Friend, Leo! Ever since Caillou met Leo in Day Care, these two mischief makers have been inseparable and always know how to have a good time – whether they are relocating the sandbox by hand or pretending to be dinosaurs!

Voiced by: Brigid Tierney; Markeda McKay (CGI specials and 2023 reboot)

Meet Clementine! A tomboy at heart, Clementine loves exploring the outdoors and especially loves finding insects! Fueled in part by her older brother Billy, Clementine is fearless and often encourages Caillou to take on ever-greater challenges, such as climbing to the top of the big kids slide.

Voiced by: Amanda Tilson

Sarah is six-year-old and knows so many neat things, like what it feels like to lose your front teeth! Confident and capable, Sarah teaches Caillou about the wonders of reading and writing and often shows Caillou things he’s never seen before – like chopsticks and the inside of the big kids’ school!

    Miss Martin
Miss Martin (also known as Ann Martin) is Caillou’s teacher and loves teaching Caillou important life lessons like sharing & the importance of safety.

    Jason & Jeffrey
Left: Jason, Right: Jeffrey
A pair of twins that goes to Caillou's daycare.
  • Innocently Insensitive: One episode had them teasing Xavier, but they revealed that they did not intend to offend him.
  • Jerk with a Heart of Gold: They might cause trouble and once made fun of Xavier, but they're still good people to have around.
  • Only One Name:
  • Palette Swap: Their shirts are striped, but their shirts have inverted color schemes in Seasons 4 and 5. Averted in their early appearances, when they wore identical shirts, leading to many a prank involving a Twin Switch.
  • Those Two Guys: Practically unheard of to see them apart.
  • Took a Level in Kindness: In Season 4, they become more comical instead of mischievous.
  • Took a Level in Jerkass: They were reversed as pranksters again occasionally in Season 5.
  • Trickster Twins: They can sometimes be a bit mischievous, but are good kids overall.

Caillou's classmate that first shows up in season 3

Emma is a pretty little girl in Caillou's playschool class. She and Xavier are the newest major characters on the show, both appearing at the beginning of season 3. Caillou doesn't know Emma and Xavier that well compared to the other kids in his playschool class. She always wears red jacket with a white shirt with a picture of a horse under it. She has a father as seen in "Captain Caillou" and "Rasberry Ruckus". She has diabetes (likely Type 1) as revealed in "Emma's Extra Snacks."
  • A Day In The Lime Light: In Emma's Extra Snacks where it's revealed that she has diabetes.
  • Nice Girl: A caring sort of kid.
  • Only One Name: Like most characters on the show, her last name hasn't been revealed.
  • Race Lift: Despite being Asian-Canadian in the books, she's Caucasian in the cartoon.
  • Recurring Extra: Mostly appears in the background when Caillou is at playschool.

Andre is one of Caillou's older friends. He is 6 years old and has orange hair. Andre enjoys playing soccer and riding his bike.
  • The Big Guy: Due to his large size and the fact that he's three years older than Caillou.
  • Gentle Giant: Bigger than Caillou, but very gentle in nature.
  • Lovable Jock: He likes soccer and many other sports.
  • Meaningful Name: He is giant and named after Andre the Giant, who was a real-life gentle giant.
  • Nice Guy: One of Caillou's closest friends.
  • Only One Name

    Clementine's Mommy
The mother of Clementine and Billy.

Billy is Clementine's older brother. He occasionally appears in episodes with Clementine. Billy's age isn't known, but he appears to be at least 12 years old. One of his hobbies is playing the drums.

Julie is Caillou's babysitter. She is around 15 years old. Julie likes playing with Caillou and Rosie.

Robbie is a deaf boy in Caillou Meets Robbie. At first, he and Caillou don't like each other, then they become friends later. He is around 6 years old.

Andy is a kid who attends Caillou's playschool. He is confirmed to have autism in "Caillou and the Fire Alarm", and likes to draw. He doesn't like loud noises and doesn't seem to like doing things the other kids do. Andy also tends to keep to himself and be isolated from the other children. Caillou tried to befriend him but Andy was reluctant at first. Caillou kept trying but it was hard. Finally, Caillou and Andy became friends after Caillou started doing things Andy liked to do.