She is a Mime along with her Partner Bon Bon. They play charades with any participants to win a prize. Although the actions Bon Bon and Chu Chu imitate while playing charades can be a bit lewd... She also only seems to communicate by writing messages on signs, or paper. She's also a bit flirty, and will constantly trick people into getting the wrong idea, or a more "Perverted answer" when playing charades. And she totally doesn't want to rob you or anything... Maybe?