We always knew that Cruella was a fashion designer, but in the film, we get a glimpse of how she became one. As Estella, she works under the famed fashion designer the Baroness, whom she idolises for her inventive looks. However, after she learns some incriminating information about the Baroness, she changes her tune. She eventually creates the persona of Cruella and acts as a rival fashion designer for the Baroness, messing up all of her big shows by crashing the party.