Jane, an expert hacker for the World Ninja Association's Info-Communications Division, specializes in retrieving top-secret Ninja-Gum data. She features fair skin, round yellow eyes, and straight dark bluish-purple hair, often with cream sunglasses featuring blue-tinted lenses perched on her forehead. Her attire includes a white sleeveless top with black-and-white checkerboard patterns, a red belt, black shorts, fingerless gloves, thigh-high red boots with zippers, and a checkerboard-patterned rag hanging from her hip. Prior to consuming Ninja-Gum, the adult Jane wore a red short-sleeved dress with white collar accents, black high heels, gold jewelry, and occasionally a beige trenchcoat.

Her personality blends professionalism with sarcasm; she maintains seriousness on missions but displays sassy reactions under stress, especially interacting with colleague Ron. She avoids morally questionable assignments and shows reluctance toward tasks involving lethal outcomes.

Jane's background begins with a failed hacking attempt on the WNA Research Institute, prompting her to infiltrate the facility physically. Ambushed by Oniwabanshu operatives and overpowered, she is rescued by Ron. Discovering a timed bomb in their hiding place, Ron compels her to chew Ninja-Gum for escape, triggering the gum's unique property: transforming adults into children while leaving children unchanged. De-aged, Jane partners with Ron to enter the Ninjala tournament undercover. Their joint objectives include uncovering the WNA's true motives behind Ninja-Gum, identifying who ordered the hacking mission, and seeking methods to reverse their age alteration.

Throughout official media, Jane evolves from a solitary hacker into an active participant within a broader ensemble, joining other gum-affected characters—Burton, Berecca, and Ron—alongside genetically gifted children Van, Lucy, Kappei, and Emma. This group collectively confronts threats like Space Ninjas, WNA conspiracies, and ninja assassins while investigating the organization's hidden agendas. Her development integrates her into the central narrative confronting Allen (head of WNA Intelligence) and Master Shadow's Shadow Ninjas, positioning her within the Gender-Equal Ensemble of protagonists navigating the tournament's underlying conflicts.