Jenny Hackett debuted as an antagonist in "Wynton's Friend," infiltrating a classroom by feigning shared enthusiasm for Bakugan and science. She complimented Wynton’s technical drawings and expressed excitement about Bakugan research, masking her true objective of gathering intelligence through calculated deception.

Her appearance features apricot skin, blue eyes, and long orange-brown hair secured in a small braid with a teal green scrunchie and ribbon. She wears a pale blue jumpsuit with rolled sleeves and calf-length trousers, accessorized with a black belt sporting a silver buckle and turquoise green and white hi-top trainers.

As a Haos-attribute brawler, Jenny commands Guardian Bakugan Crustillion alongside partners Cyndeous and Cimoga. She strategically deploys two Haos Geogan—Mutasect and Sky Horse—in battles.

Initially displaying excitable scientific curiosity and deep Bakugan knowledge, her demeanor concealed an amoral, self-serving nature. She manipulated others without hesitation, even exploiting her Bakugan partners. This included feigning romantic interest in Wynton to infiltrate the Awesome Brawlers while covertly advancing her own agenda.

She operated within Gregorius Reed’s gang, leveraging technical expertise and Bakugan prowess to further the group’s objectives during her antagonistic phase. Following Viloch’s defeat, she underwent a significant shift toward altruism, voluntarily aiding Crystal Blue’s projects and sharing food with Lightning to demonstrate genuine cooperation.

Her scientific acumen surfaced early when she questioned Wynton about anomalies in Bakugan behavior, expressing distress over vanished Bakugan—hinting at latent concern for their well-being. This expertise later underpinned her collaborative efforts after her transition.