Created by Peter Brash and Paula Quickly, the role of Cassie was cast with Alexis Thorpe, who had previously portrayed Rianna Miner on The Young and the Restless.

The twins had matching tattoos resembling the Phoenix, which called their connection to Stefano DiMera and John Black into question.

As time went on, they were believed to be the children of Tony DiMera and Marlena Evans, who were taken away as toddlers and genetically manipulated by Stefano's scientific genius, Wilhelm Rolf.

In reality, a sperm sample had been stolen from Roman Brady during his years as Stefano's captive and was combined with eggs taken from Kate Roberts.

Soon after their secret is revealed publicly, Cassie is killed by the "Salem Stalker" and her stabbed body is staged inside a Thanksgiving piñata.