Rosie

"' GRRRRRRRRRRRRRR! I hate being grounded! Its all because of Caillou! '"- Rosie angrily thinking to Caillou.

Rosie Anderson (simply Rosie) is the (former) false main antagonist/deuteragonist of Caillou's Ungrounding Story. She is revealed as the main antagonist in Caillou's Ungrounding Story Episodes 1-4. In Episode 5, she apologized to Caillou that she always troubles him. This meant that Rosie's true nature was the deuteragonist.

Biography
Rosie Anderson was born on 7-6-2007 or June 7th 2007 on Plotagon City