Shibazaki was once an elite investigator in the Investigations Division, known for his sharp intellect and refusal to back down from powerful figures. His career took a drastic turn when he investigated a corruption scandal involving high-ranking officials, leading to his demotion to the Records Division.

As a result, Shibazaki became disillusioned and cynical, spending most of his time reviewing old cases rather than actively working on new ones. However, when Sphinx begins their bombing campaign, Shibazaki finds himself drawn back into the field, eager to prove that his investigative instincts are as sharp as ever.

Throughout the investigation, Shibazaki uncovers shocking truths about the Japanese government’s inhumane experiments, realizing that Sphinx is not merely a terrorist group but a product of deep-rooted corruption. His pursuit of justice places him at odds with his superiors, but he remains unwavering in his commitment to exposing the truth.

Shibazaki has the worn-out look of a man who has seen too much. He has graying, unkempt hair, a constant stubbled beard, and a generally disheveled appearance, reflecting his cynical and world-weary nature.

Unlike most of his colleagues, Shibazaki does not wear a formal suit and is often seen in plain dress shirts with rolled-up sleeves, sometimes paired with a trench coat. His tired expression and slouched posture further emphasize his lack of enthusiasm for the bureaucratic system he works under.

Despite his appearance, his piercing eyes reflect his brilliant deductive mind, and when engaged in an investigation, he exudes an intense, calculating presence.

Shibazaki is a cynical yet highly intelligent detective, possessing a strong moral compass and a deep-seated hatred for corruption and injustice. Though he is often seen as jaded and indifferent, his passion for justice has never faded he simply hides it beneath layers of sarcasm and exhaustion.

Despite his gruff and detached demeanor, Shibazaki is not without empathy. He is especially protective of younger officers, like Hamura, and remains deeply troubled by the unethical actions of the government.

• Investigating Sphinx
  Shibazaki is reluctantly pulled back into active investigations when the terrorist group Sphinx (Nine and Twelve) begins a series of highly calculated bombings across Tokyo. Unlike his colleagues, who treat the case as a straightforward act of terrorism, Shibazaki immediately recognizes a deeper meaning behind their actions. His brilliant deduction skills allow him to decipher Sphinx’s riddles, putting him on their trail faster than anyone else in the force. However, his superiors constantly undermine his efforts, as they are either incompetent or deliberately trying to bury the case due to Project Athena’s involvement.

• Confrontation with Five and the Government
  As the investigation intensifies, Shibazaki comes into direct conflict with Five, a government agent from the U.S. intelligence division who was also a survivor of Project Athena. Unlike Nine and Twelve, Five serves the corrupt system, ruthlessly attempting to eliminate Sphinx before they can expose the truth. Despite facing government interference, Shibazaki refuses to give up, putting together the final pieces of the puzzle and exposing Project Athena’s existence. His determination forces his superiors to acknowledge the truth, even though it is too late to prevent the tragic conclusion of Sphinx’s story.

• Witnessing the End of Sphinx
  In the final act, Shibazaki witnesses the execution of Twelve at the hands of U.S. intelligence agents. Despite all his efforts, he is powerless to stop it, leaving him deeply disturbed and enraged. He is also present during Nine’s final moments, where he listens as Nine reveals the full truth behind Project Athena before succumbing to the experiments’ fatal side effects. Though he fails to save them, Shibazaki ensures that Sphinx’s message is heard, making him a crucial player in their posthumous victory.