Caillou "Kayloo" Anderson is a primary character/subject for several GoAnimate-focused YouTube channels and the main villain of Cailloufication. He first appeared in African Vultures Caillou Gets Grounded series. He is based off the character of the same name from the Canadian children's TV show that also shares the same name. Caillou is usually portrayed as a scheming troublemaker who often gets caught disrupting class, skipping school or important events, lying, cheating, or playing pranks.