Caillou is the overall main protagonist (and sometimes antagonist) of the GoAnimate Caillou series. He is the titular main antagonist of the Caillou Gets Grounded series, and is sometimes the titular main protagonist of the Caillou Gets Ungrounded series, Battle for Dora Gets Ungrounded, and the tetratagonist of Rosie gets grounded/ungrounded. Sometimes, his goal is to ground or unground Rosie depends on her actions & he finally grew hair when he was 16 years old. He is an iconic character.


Caillou's birthday is on June 21. In Samster5677's series, Caillou is a troublemaker, but his sister Rosie is a non troublemaker, He is a non troublemaker in some channels, but most of the time, he's a troublemaker. While in DGGHater2004's series, he's a pianist. He also has a father named 'Boris' and has a mother named 'Doris'. His favorite shows are Family Guy and King of the Hill. Caillou was also going to a playable character in super smash bros ultimate how ever, he was rejected becaues he was a opinion disrespecter.