Polly Squeakster

Polly Anne Squeakster is Barrentina's 5 year old little sister and the main character of the show, Barrentina Happiness. She is voiced by Tree Adams.

She is an eager mouseling when Barrentina takes time to show her some basics of learning things. Although she is too young to do a few of them, she still loves watching her favorite big sister perform sometimes. She is often called "Little Polly" or "Young Polly" or "kiddo" by her family. As the princess, she sings the Royal Fanfare: "Doo-doo-doo-doo-doo!" Polly always loves to have fun.

Polly wears a yellow shirt with blue overdress with a pocket on it, yellow socks and red shoes. She is a female, anthropomorphic mouse.