Anya Forger is a young girl with light pink hair and large, oval-shaped emerald green eyes, often wearing black hair ornaments shaped like tiny horns. Originally designated Test Subject 007, she gained telepathic abilities through unspecified experiments conducted by an unknown organization. She escaped the facility and moved between orphanages and foster homes before being adopted by spy Loid Forger as part of his mission to infiltrate Eden Academy. Though she appears younger, she poses as a six-year-old to qualify for the school. Her telepathy manifests as faint spark-like imagery around her head, but the ability falters with intricate or emotionally charged thoughts, becomes overwhelmed in large crowds, and stops working entirely during new moons. She hides her powers from others, fearing rejection, yet uses them secretly to protect her adoptive family—including her mother, assassin Yor Forger—and to aid their covert missions.

At Eden Academy, Anya struggles academically due to poor study habits and reliance on telepathic cheating, though she shows aptitude in classical languages. Her impulsive punch at Damian Desmond, the son of a key political target, initially isolates her, but her courage during crises, such as a hijacked bus or a bomb threat, gradually earns her peers’ respect. She forms a genuine friendship with Becky Blackbell while largely misinterpreting Damian’s growing affection as hostility. Outside school, she loves spy-themed cartoons like Spy Wars and peanuts, and she bonds with Bond, the family’s precognitive dog, using his visions to defuse dangers. Despite her childish whimsy, distractibility, and tendency toward short-term solutions, she displays surprising resourcefulness and emotional maturity, working to preserve the Forger family’s fragile bond and expressing a deep desire for a stable, loving home.