In the book Who Censored Roger Rabbit, she was an amoral upcoming star elena of avalor costume former comic strip character, over whom her estranged husband, fellow comic strip star Roger Rabbit, obsessed. In the film, she is reimagined as a sultry-but-moral cartoon actress and singer at a Los Angeles supper club called the Ink and Paint Club.

She attests to Eddie Valiant that “I’m not bad, I’m just drawn that way. Indeed, she proves herself to be selfless and compassionate throughout the movie. Although she seems cool and distant, she has a soft spot for Roger, whom she married because he “makes her laugh”, is a better lover than a driver, and that he’s magnificent and “better than Goofy”. She makes it clear that despite what others think of her, she only has eyes for Roger and would do anything for his sake. Yet despite the danger, she maintains a calm composure and exhibits great skill in combat, including handling a gun.

Jessica is a statuesque tall, immensely beautiful, alluring, voluptuous, glamorous and exquisite and drop dead gorgeous woman with a curvy and slender hourglass figure with a narrow waist and large, broad hips. She has fair skin and long, luxurious red hair with side-bangs that usually cover her right eye. Her green eyes are heavy-lidded and seductive with long dark lashes and accented by shimmering lavender eye shadow. Jessica is first seen from behind the stage curtains at the Ink and Paint Club, singing “Why Don’t You Do Right? While they play patty cake, Eddie pulls out his camera and takes several pictures through an outside window. Later, after Roger sees the pictures for himself, he breaks down and pulls out his wallet to look at photos of him and Jessica on their wedding day, their honeymoon on a beach, and them hugging each other at a bar, begging and pleading that it is not true and his wife is seeing another man.

The next morning, at the Acme factory, following Marvin’s murder, Jessica, angered that Eddie incriminated Roger, smacks his face real hard, and scolds him, saying that she hopes he’s proud of himself, and the pictures he took. Officers and investigators who witnessed her reprimand Eddie can only stare in shock and disbelief. The next day, Jessica shows up to Eddie’s office to try and explain the situation, even offering to pay any price he asks. Jessica then eavesdrops on Dolores and Eddie from her car as Dolores, calming down from earlier in Eddie’s office, reveals that Cloverleaf Industries is after Toontown and unless Acme’s will is found by midnight that night, Cloverleaf will claim Toontown as the company put in the highest bid for it at the auction of Acme’s assets. Later that night, outside Maroon Cartoons, Jessica hits Roger’s head with a frying pan and throws him into the trunk of her car, then turns her attention to the window of Maroon’s office where she hears Maroon and Eddie talking. After Maroon’s murder, she runs to her car and seen by Eddie just before he exits the building, making Eddie believe she was Maroon’s killer. The car chase begins, as he tries to follow her, but she disappears into a tunnel leading to Toontown.

Eddie finds his way into an alley, where Jessica aims her gun at him. She yells for him to look out behind him and then shoots, hitting the gun of another shooter who was aiming at Eddie, who turns out to be Judge Doom. She says she followed Doom to Maroon’s studio, but she was too late to stop him from murdering Maroon. Doom then shouts at the two as he flees. Jessica drags Eddie to her car to follow Doom, only to find Eddie’s car, which rear-ended hers, gone, along with Roger.

Seeing a path of destruction behind them, they realize Roger, who is not a good driver, woke up and drove off. Just then, they hear the siren of the Toon Patrol as the Toon Patrol’s paddy wagon rounds the corner up the street and heads straight for them. Benny the Cab shows up to drive them to safety. At the factory, Eddie and Jessica are searched, with one of the weasels, Greasy, offering to frisk Jessica with obvious perverted intent. He puts his hand in Jessica’s cleavage only to get his hand caught in a bear trap.

After assuming the will is gone, Doom reveals his Dip Machine, which will completely erase Toontown. He then explains he found plans for a freeway, which he plans to build in Toontown’s place, hoping to monetize the transportation. Before his departure, Doom advises his second-in-command, Smarty, to let Eddie watch Roger and Jessica get dipped, then shoot him. Eddie, having discovered the weasel’s weakness, clowns around until the weasels laugh themselves to death.