In 2004, Jessica was a part of the FBC, partnered with Parker Luciani during the biological attack to the floating city of Terragrigia. The two worked together to rescue a wounded Raymond Vester, and after fighting through waves of Veltro controlled Hunters the two escaped the doomed city via helicopter shortly before their commander, Director General Morgan Lansdale, ordered Terragrigia's destruction at the hands of the Regia Solis satellite.
After the incident, both her and Parker joined the BSAA.
At that moment, a masked figure believed to be Veltro leader Jack Norman appeared, threatening to reveal the secret of Lansdale's labs on board the ships. Jessica, who had been a double agent acting as a mole for Lansdale, took the initiative and shot the masked man. This man was later revealed to be a disguised Raymond Vester, who was working under the orders of Director O'Brian to attempt to expose Lansdale's illicit operations. Vester then supposedly died from his wounds.
Agreeing to split into their old partnerships, Chris and Jill investigated the ship's labs while Parker and Jessica headed elsewhere. She then told Parker to go to the bridge while she headed below to stop the sinking. In reality, she took a more direct route to the bridge in an attempt to activate the ship's self-destruct mechanism to destroy the labs and protect Lansdale. When she was caught in the act by Parker and an unharmed Raymond before she could, she revealed to them both that she was the mole in the BSAA, and tried to shoot Raymond again, but Parker took the bullet instead. She succeeded in activating the self-destruct mechanism and left, with Raymond in pursuit.
Though Raymond said that Jessica escaped, actually the two had been working in collusion the entire time as triple agents employed by TRICELL. She met Raymond in a European cafe, where Raymond provided her with a sample of the t-Abyss virus. She asked Raymond the reason for him saving Parker, in which he replied to her by saying that he had his reasons. The two went their separate ways, and their current locations are unknown.
Jessica seems to have a 'devil may care' attitude toward her missions. She is not adverse to the odd complaint or even light-hearted joke, but her extroverted nature can often cause friction and disruption within the BSAA. Often allowing her personal feelings to be known, Jessica is not shy when it comes to confessing her true desires. Her partnership with Parker stems from their survival of Terragrigia and she often has light hearted banter with him, often claiming he owes her a lobster dinner. Indeed, it's suggested that she enjoys the finer things in life and could be somewhat materialistic.
Jessica's romantic interest in Chris seems one-sided, with Chris maintaining a professional relationship with her. She also seems oblivious to Quint's crush on her. Her partnership with Raymond is elusive, although both agents played their parts so well that they managed to survive the FBC and recover the T-Abyss sample for Tricell.
Jessica is also a master of deception, managing to hide her true intentions throughout the Zenobia incident. Her deceptive nature lead her to survive the incident and escape the BSAA to work for Tricell.
As a former FBC and BSAA agent, Jessica is a skilled marksman, proficient in the use of many firearms. Her weapon of choice seemed to be a sniper rifle, able to defend Chris from Fenrir attacks from up high. She was able to shoot a the disguised Raymond a point blank range. According to her Report, Jessica seemed to have adequate knowledge of the creatures she witnessed, documenting them efficiently. She was able to fool both the BSAA and Morgan, acting as a triple agent ultimately working from Tricell.