Jenny Hackett debuted as an antagonist in *Bakugan: Geogan Rising*, specifically in "Wynton's Friend," operating as a Haos brawler aligned with Gregorius Reed's group. Her primary Guardian Bakugan was Crustillion, supported by the Geogan Mutasect; she later wielded additional Haos partners Cyndeous and Cimoga, plus the Haos Geogan Sky Horse.

Physically, Jenny possesses apricot skin, blue eyes, and long orange-brown hair typically tied in a small braid secured by a teal green scrunchie and ribbon. Her attire includes a pale blue jumpsuit with rolled sleeves and calf-length trousers, a black belt featuring a silver buckle, and turquoise green with white hi-top trainers.

Initially presenting as an excitable young girl passionate about Bakugan, science, and research, Jenny concealed an amoral, skittish, and self-interested nature. She exploited her Bakugan partners without ethical restraint to achieve personal objectives. Her infiltration of the Awesome Brawlers involved feigning admiration for Wynton’s technical drawings and enthusiasm for their Bakugan. She probed Wynton about the non-disappearance of certain new Bakugan, exhibiting visible distress at his lack of answers and refusing to aid his research.

Following Viloch’s defeat, Jenny shifted toward cooperation and consideration, evidenced by voluntarily assisting Crystal Blue’s goals and sharing food with Lightning.