She is the Chief Inspector of Shinjuku and has a big crush on Tatsumi Saiga.
Raised in the lap of luxury, her home environment was lacking, so she ended up with a very individualistic and strong-willed personality. Her record is excellent, she's an all-around athlete and thanks to her love of action movies, she knows several martial arts styles. She's also a gun maniac. While she was attending a prestigious metropolitan university, she applied to be able to fire a gun legally. She passed one of the national civil service exams with ease and after she graduated, she joined the police with a career on the force in mind. Due to her selfish actions and because she's a woman, she has faced some obstacles on her career path. She is currently working as a police officer in Shinjuku as part of the New Metropolitan Special Division, living her days however she wants. Because she's come this far in life without doubts about how society work, the love of money has become a part of her and she's busier dealing with stock transactions than she is with her actual job. Using her main job to do insider trading to make herself quite a bit money, she enjoys a bubbly life. When she was twenty-five years old, she met Saiga because of a certain incident. In a world where money is everything, meeting Saiga, whose values and way of living were completely different from hers, put her through culture shock. Since then, something has been nagged at her, and she's looked after him. Her catchphrase is, "That was in self-defense."
Just like most other people in the world, she values material possessions and money the most. She's more into her stock trading than police work. She lives in an expensive condominium paid for by the money she's made, and gives her undivided attention to her gun collection and her brand name goods. She loves things made in Italy. The car Saiga drives is actually Gizna's. She is especially attached to her guns.
She's rough and violent, selfish and self-centered, but when she becomes attached to something, she's devoted to it. She's the kind of person who can't stand not getting what she wants. She's also the kind of person who really gets into anything she's interested in, so she's obsessed with other things beyond her guns, like her clothes, her accessories, her bike and her car.