Rebecca was a character who only appeared in the home video Barney's 1-2-3-4 Seasons, She was portrayed by Erica Reynolds.
During the video, it's evident that Rebecca enjoys spending time with her friends. In the video, Rebecca discovers Barney in the picnic basket of the children. She informs Barney, once he springs to life, that he was sitting on a peanut butter sandwich during his ride in the basket. She declares that her mother makes the best peanut butter sandwiches in the world. She eventually offers it to Barney.
Eventually, BJ comes by and Barney and the kids help BJ with four magical jars and a little bit of imagination, help him experience spring, summer, fall, and winter all in one day. She has fun with the others in the seasons of spring and summer. Rebecca would eventually open the fall jar, unleashing the season for everyone to experience. She was unaware that autumn was the alternative name for fall until Barney explained it.
Eventually, BJ opens the winter jar for everyone to experience. During this season, Rebecca pretended to be the voice of the snowman they just built, encouraging BJ to be careful given that he knocked the hat off of the snowman's head when throwing a snowball. She eventually makes it known that it was her behind the snowman after BJ was shocked by the snowman speaking.
Once their day of experiencing the four seasons was over, Rebecca makes it known that she enjoyed the snow and sledding the best. The children eventually look outside to see what the weather's like and Rebecca exclaims that the weather looks just right for a game of tag.