He is voiced by David.
In the OliverWestern series, Daillou is introduced as Caillou's twin brother. He is one of the many prisoners at Barnhurst. He is currently serving time in Barnhurst for urinating down the teacher's leg. His best friend is Diesel Warner, whom he calls Wonky Warner.
In other GoAnimate videos, he is portayed as one of Caillou's twenty-five siblings (Zaillou being the only female in the 26 Caillou Siblings).