Ginshi Shirazu is a Rank 3 Ghoul Investigator, and a leader of the Quinx Squad.
Shirazu, like most of his teammates, is shown to have great respect for his mentor, Haise Sasaki. However, he is easily manipulated by Urie, and constantly seen accompanying him, the former squad leader, on dangerous assignments. Although he is a competent fighter with a ruthless nature, Urie describes Shirazu as a simple-minded person. This becomes evident when Urie easily manipulates him into thinking that Sasaki is using the Quinx for his own gain. He easily becomes fired up and speaks loudly.
He also seems to be quite exaggerated in his expressions and movements.
His primary motive for joining the Quinx Squad is to get money in order to pay for treatment to heal his hospitalised sister, Haru, who he was left to take care of after his father committed suicide.
He is stated to be poor at tasks that require thought, such as academics or investigation. However, his consideration for others and attention to his surroundings convince Sasaki he has potential as a Squad Leader. In contrast to his loud and violent mannerisms, he is also someone that cares greatly for his team. While prone to bickering with Urie, he shows a gentler side when interacting with Mutsuki or civilians such as Chie.
Despite his habit of being easily influenced, he consistently demonstrates a strong admiration for Sasaki, of whom he shares a friendly relationship with.
Shirazu has a crush on his superior, Akira Mado, and refers to her as the “Holy Mother” of CCG. His team appear to be aware of this fact.
While initially, Shirazu seems to be quite a carefree individual, and seems to have an obsession for exterminating ghouls; both of which are traits that submit to the cocky grin he usually displays- after exterminating the Chimera ghoul known as Nutcracker, he begins to question this attitude to the point where at times he completely fails to cooperate during fights.
This trauma primarily stems from the fact that Nutcracker’s final words, “I want to be beautiful”, remind Shirazu of his sister, whom would repeat those same words in her hospitalised state when Shirazu went to visit her.
During the Rosewald arc, Shirazu and the other members of the Quinx squad engage in a fight against Noro.
After Noro makes use of his outstanding regenerative abilities multiple times, Shirazu finally manages to get a hit in, leaving Urie to deal the final blow.
Together, the two manage to kill Noro, however as a result, Shirazu took fatal damage to his torso, dying while being cradled by Urie and surrounded by Saiko, Mutsuki and Kuramoto.
During his final moments Shirazu tells Urie that he doesn’t want Haru to suffer any longer and requests that they cut her life support- it is unknown whether Shirazu genuinely felt this way, but Urie remarks later that he feels Shirazu simply didn’t want to be bothersome to the team.
The remaining Quinx members vow to continue paying towards Haru’s treatment.
After his death, Shirazu’s corpse is stolen by Furuta Nimura (Souta) and given to Kanou who uses it to investigate the nature of the Quinx surgery.
He later becomes a Rank 2 investigator.