Boris is Caillou's dad in the original Caillou series and the main protagonist of the Caillou Gets Grounded videos on GoAnimate, and sometimes the main antagonist of the videos.
In GoAnimate, he often grounds Caillou for some of the bad things that he has done in his life, but will occasionally ground Rosie, too. Though he does get upset if his wife Doris gets frustrated with him, and will do anything to make her happy.
Evil Boris Edit
In February 2016, GoAnimate and YouTube user Julian3535 used the red Boris that Isaac Anderson originally created and called his name "Evil Boris", or "Boris the Teeth Guy".