Jin works for the Company alongside colleagues like Katsuragi and Ron. As the CEO's niece, she openly acknowledges this familial tie to associates such as Satoru. Professionally, she defuses tensions through direct solutions—like proposing Katsuragi’s aid for unspoken issues—and engages Satoru with drink offers and information. Though perceptive of manipulation, she feigns susceptibility before challenging motives. Jin states her age as twenty-four and seeks "Images" to access memories of her mother from those who knew her. Her earliest recollection, from age five, involves receiving a locket with her mother’s picture.

Her appearance features medium-length hair with a purple tint, styled outward with choppy tips and fringe. Dark scarlet eyes contrast rose red lipstick. Typical attire includes a cream open blouse over a pale blue top, a yellow neck strap, and drop earrings. Alternate outfits include a sleeveless pink floral dress or frilled white blouse with an orange skirt.

In Company operations, Jin connects Katsuragi with counselor Zhou—crediting Zhou for Japanese channel control—and surveils targets like Fish & Fish with Ron. She coordinates phone communications during missions and travels with Ron and Meiling. At a hotel bar, she orders a martini while conversing with Satoru, later revealing her immunity to his powers. Guiding him to a VIP suite, she discloses her dual role as both Company employee and "Crusher," sharing Company history: qigong masters murdered the CEO’s father, and Hayashi tracked them. She extends Satoru a recruitment offer but later reflects on her cousin’s critique of her superficial approach.

Strategically, Jin discusses neutralizing threats like the Chen Group patriarch’s illegitimate grandson, who jeopardizes the CEO’s inheritance. She helps Satoru conceal his forehead scar for a mission targeting a Chen-linked ambassador, distracting the ambassador’s wife while coordinating with Katsuragi. When Hiroki is hospitalized mid-operation, she orchestrates his cover-up using a lookalike and directs Katsuragi to protect Satoru. She confirms Hayashi’s crushing and notes Tsukasa’s new status as organizational "son."

Over a meal with Satoru, Jin shares her locket photo, explaining her mother was the first Crusher, raised by qigong masters. Her grandfather cared for her from infancy, enabling early memories. She wishes to revisit her mother’s "most beautiful" memory via an Image through her uncle, the CEO, as her father is absent.

Jin oversees Meiling, a compliant created "baby" pet. She feeds and maintains Meiling’s physical needs despite minimal responsiveness, deploying her memory-altering abilities in Chen Group missions. She witnesses Meiling’s distress over her threatened butterfly image and observes Hayashi—who supplied Meiling’s Peak—interact with her. Jin remains present during critical events, including Ron’s death and the CEO’s consolation.