Main Characters Caillou (8 episodes, 2005-2006) Gilbert Rosie; Clementine Caillou (2000-2001) Clementine's Mom (French version) Daniel (3 episodes, 2010) Miss Martin (40 episodes, 2000-2006) Leo (21 episodes, 2010) Caillou (2002-2004) Caillou's Mom Teddy Caillou's Dad Rexy Clementine (17 episodes, 2010) Alan (4 episodes, 2005-2006) Boy Dee-Dee (French version) Caillou (French version) Caillou's Grandma (French version) Gilbert Grandpa Caillou's Dad; Rexy Julie Nounurs (French version) Leo (French version) Rexy Caillou's Grandpa The Storyteller Caillou's Mom (French version) Caillou's Grandma Caillou's Grandma; The Storyteller (French version) Sarah (French version) Mousseline (Rosie); Clementine (French version) Deidi Rosie Leo (3 episodes, 2006)