Rhonda is a tour guide at the museum where Ross used to worked. She was portrayed by Sherri Shepherd.
Joey got a temporary job as another tour guide and Rhonda sat with him at lunchtime. Ross declined to also sit with Joey so Rhonda explained "white coats" like Ross do not sit with "blue blazers" like her or Joey. To demonstrate she very loudly yelled at Peter, a "white coat" sitting with Ross. They played all the time together at elementary school and she shared her Pudding Pockets with him. Despite her loudness, Peter pretends not to hear her.
When the colleagues share embarrassing facts about themselves in the museum cafeteria, she admits that her large breasts are not real.