Cassandra Freedman is a fictional character from the Australian soap opera Neighbours, played by Tottie Goldsmith. She made her first screen appearance during the episode broadcast on 10 February 2009. Goldsmith did not have to audition for the role of Cassandra and was instead chosen by the producers for the role. The actress began filming her first scenes at the end of September 2008. She was initially contracted for six weeks, but this was extended after she impressed the producers with her performance. Goldsmith filmed her final scenes in January 2009 and Cassandra's departure was aired on 29 April 2009.

Donna Freedman is a fictional character from the Australian soap opera Neighbours, played by Margot Robbie. She made her first screen appearance during the episode broadcast on 2 June 2008. Donna was initially introduced as a guest character, but Robbie was promoted to the regular cast shortly after she made her debut. Donna was originally portrayed as an obsessive fan of musician Ty Harper and someone who had a desire for friends and acceptance. After befriending the teens of Ramsay Street, Donna changes her ways and matures into a warm, loveable girl. She has been described as being fiery, beautiful, kooky and confident.