Caillou

Caillou (pebble or stone in French), nicknamed The Prince of Imagination,[3] is the title character of the show. Caillou was first voiced by Bryn McAuley from 1997 through 2000, then Jaclyn Linetsky in 2000 through 2003, and then, due to Linetsky's death, Annie Bovaird from 2003 through 2010. Caillou was first shown in the episode "Caillou Makes Cookies", which aired in 1997.

Caillou is an imaginative four-year-old[4] boy with a love for forms of transportive machinery such as rocket ships and airplanes. A dreamer, Caillou is prone to frequent dream sequences in some episodes, visualizing his daydreams and hopes, and many episodes chronicle his normal daily experiences with his parents, friends, and neighbours. Caillou particularly loves his stuffed dinosaur Rexy and teddy bear Teddy, along with his pet cat Gilbert, all of whom are depicted as puppets in segments featured in the earlier episodes.

Caillou and his family from left to right: Rosie, Daddy, Caillou, Mommy

• Rosie (French name: Mousseline) – Caillou's lively younger sister who is a typical toddler. She is two years old.[4] She always wants to take part in the same activities as Caillou. In later seasons of the series she becomes more talkative and independent. She wears a blue dress, red socks and blue Mary Jane shoes. Rosie sometimes fights with Caillou, but they still love each other. She appears to be the only family member with red hair. Rosie was first voiced by Brigid Tierney, then Jesse Vinet.

• Doris[4]/Mommy – Caillou's mother. She is a busy homemaker most of the time but is seen to work in an office too. Caillou occasionally helps his mom with various chores and she often takes time to involve Caillou and his friends in activities such as crafts and baking. She is predominantly dressed in a red blouse with yellow trim, blue headband, blue ankle-length pants and blue shoes with green soles. Voiced by Jennifer Seguin.
• Boris[4]/Daddy – Caillou's father. He and Caillou occasionally work on projects around the house. He wears a green sweater with a red trim, and blue pants. In the episode "Caillou The Chef" he says he once worked at a restaurant and made pizza.[5] He is voiced by Pat Fry.

• Gilbert is Caillou's cat.

• Grandma – Caillou's paternal grandmother. Grandma is a very active adult who loves the arts and the outdoors. She passes that love on to Caillou. Grandma often comes up with creative ideas to solve Caillou's problems. She and Caillou paint and go birdwatching together. Voiced by Pauline Little.
• Grandpa – Caillou's paternal[4] grandfather. He takes Caillou on adventures, often going on walks and riding the bus throughout the town where they reside. In "Caillou's Hiding Place", he showed Caillou a hidden area inside a tree in the backyard.[6] In the episode "Caillou Goes Camping", he and Caillou camp in the backyard. He is Daddy's father and loves to tell stories about Caillou's Daddy when he was a little boy. He wears a blue shirt. Voiced by George Morris.

• Mr. Hinkle (French name: Monsieur Lajoie) – Caillou's neighbour, introduced in the 1998 episode "Caillou's Not Afraid Anymore". He has a gold tooth. In the episode "Farmer for the Day", it is said that his first name is Paul.

Caillou and his friends: (back) Clementine, Sarah – (front) Gilbert, Caillou, Leo, Rosie

• Leo – Leo started out as a mean boy in the 1999 episode "Caillou Goes to Day Care", but quickly befriended Caillou in the same episode. They have been inseparable since. According to Caillou's Holiday Movie, Leo is Jewish and celebrates Hanukkah. Voiced by Vince Davies.
• Clementine – Clementine was the first to befriend Caillou in the 1999 episode "Caillou Goes to Day Care". She can get rather bossy sometimes, but all in all she is pretty understanding. She is voiced by Brigid Tierney.
• Sarah – Caillou's friend whom he first met in "Caillou Goes Around the Block". She is of Chinese heritage and celebrates Chinese New Year. She has a cousin in an episode where she invites Caillou to celebrate Chinese New Year. In another she invites him to school for "Bring Your Younger Siblings to School Day" because she has no siblings. Sarah has a pet cat named Olly and a dog named Murphy. Sarah is voiced by Amanda Tilson.
• André – An orange-haired boy, André is introduced in the episode "Caillou's Big Friend" and usually wears red sandals. According to the song "Days of the Week" released on the Caillou music CD Caillou and Friends, Caillou plays with him every Saturday. André enjoys biking and soccer.
• Julie – Caillou's and Rosie's teenage babysitter. She has blond hair, and enjoys playing with Caillou and Rosie.
• Jason and Jeffrey – Identical twins who are of Puerto Rican descent. They both enjoy eating pizza. Initially, they wore identically coloured clothes. By Season 4, though, Jason started wearing a shirt with inverted colours, in order to tell them apart. They are both in Caillou's playschool class. The first episode they appeared in was "New House, New Neighbors"
• Billy – Clementine's older brother. He is usually seen playing in a band with his friends or playing in sports.
• Miss Martin – Caillou's preschool teacher. She has red hair and wears red overalls with a white long-sleeved blouse. According to the episode "A Surprise for Ms. Martin" her birthday is in June. Her first name is Ann; this was revealed in "Caillou Goes to Daycare".
• Jonas – Daddy's friend from before he met Mommy. He lives on a ranch and has a horse named Lucky. Jonas appears in 4 episodes and in Caillou's Holiday Movie.
• Emma – A girl in Caillou's playschool class who hates loud noises.[7] It is revealed in an episode that she has Type 1 Diabetes.[8]
• Xavier – A boy in Caillou's playschool class who has brown hair and wears blue overalls.

The puppet segments were used only on the PBS telecasts of Caillou from 2000 to 2003 as continuity to fill time usually taken up by commercial breaks during the original Teletoon broadcasts; later episodes on PBS did not include the puppet segment continuity.

• Gilbert – Caillou's pet cat. He is the leader of the group. He has a greyish-blue body with black stripes and loathes dogs with a passion. He especially hates the bulldog in the neighbourhood. In the puppet segments of the program, Gilbert often composes odes.
• Rexy – Caillou's toy dinosaur. Bluish in colour and speaks in a somewhat Hispanic accent, he is very playful. Rexy has the incapability to give a "good" hug. Rexy is noted for being rather pedantic. His speech impediment has been the scourge of his existence; he is often teased about it, and tends to react violently to any mention of it.
• Teddy – An old teddy bear that once belonged to Caillou's daddy, and now belongs to Caillou, Teddy is reasonable, cute and brown. He is somewhat pessimistic, but all in all, he just needs a hug. Puppeteered by Frank Meschkuleit.
• Deedee – A brown squirrel, she has a bushy tail, and is often seen playing with Rexy. Deedee first appeared as a baby squirrel when Rexy found on the ground lost from her family. Deedee lives in Caillou's backyard where most of the puppet segments take place. She was absent in Season 3. Puppeteered by Wendy Welch.