Rosie is one of many animal villagers from the Animal Crossing franchise. She is not a main character, but after the success of the Animal Crossing: Wild World movie, she became one of the most popular characters in the series (along with Eloise), possibly even more so then characters like Blathers and Mr. Resetti.
Appearance and Personality
Similar to Rover, Rosie is a blue cat with large eyes. She is very cheerful and enthusiastic. She is a peppy villager, meaning she is friendly and apologetic.
Rosie has appeared as a possible villager to move in to your town from Animal Forest all the way to Animal Crossing: New Leaf. She has also had small cameos in both Super Smash Bros. Brawl and Super Smash Bros. for Nintendo 3DS / Wii U. Most notably is, once again, the Animal Crossing movie (which you can read about here: List of Nintendo movie adaptions), and she has appeared even in certain copies of Monopoly: Nintendo Collector's Edition.