Kazura Iha is a main character in the story, a young man whose real name is Takuma Kishida. He works as a spy while maintaining a cover as an employee at a photo studio. Physically, he is a muscular individual with black hair, which has a few distinctive strands sticking out on the front right side of his head, and brown eyes. His typical attire is neat and dressy, reflecting his orderly nature.

His personality is defined by a great sense of pride and honor, traits that stem from his descent from a samurai family. This background has instilled in him strict manners and a conservative personality, which frequently leads to conflicts with one of his colleagues, Aoi Miyoshi. His sense of honor is so strong that it directly influences his actions in the field. Despite being a teleporter, Kazura is often reluctant to use his supernatural ability. He believes that employing his power gives him an unfair advantage over his opponents and prefers to rely on his own physical and martial skills in combat.

Kazura's motivations are deeply tied to his personal code and his family history. While he aspired to enter the Imperial Japanese Army and had gained recognition there, he was pulled out of the military and forced to join the Sakurai Kikan, the secret intelligence unit that forms the core of the series, specifically because of his teleportation ability. His skills are not limited to his power; he is also fluent in multiple languages, including Chinese, German, and English, and is highly skilled in a form of jujitsu.

His role in the story is that of a skilled operative whose abilities are invaluable for infiltration and escape, even as he personally wrestles with the morality of using them. His key relationships are central to his development. His frequent clashes with the more easygoing Aoi highlight his rigid, honor-bound nature. A significant figure from his past is a childhood friend named Nishio, who became a communist activist and a member of the Chinese Comintern. Their reunion forces Kazura to confront his past and the vastly different paths their lives have taken.

Over the course of the narrative, Kazura undergoes significant development. Initially a strict adherent to military discipline, he becomes a conflicted figure. At a critical juncture, he chooses to side with a charismatic officer named Isao, whose vision for Japan's future resonates with Kazura's own beliefs about honor and the lessons of war. He teleports away from his teammates, leaving them shocked by his betrayal. This path, however, leads to further turmoil. After a close comrade, Natsume, is fatally wounded, Kazura experiences a profound realization that he has been living in the past rather than looking toward the future. This epiphany leads him to abandon his misguided allegiance and rejoin his former allies in the Sakurai Kikan, culminating in a final mission where he combines his teleportation powers with Aoi's to stop a catastrophic weapon.

Kazura's notable abilities are centered on his teleportation, but the power has specific limitations. He cannot freely teleport to any location he wants; he must be able to properly envision his destination. Furthermore, he is limited in the number of teleportations he can perform within a short period of time. In addition to this supernatural gift, his linguistic skills and mastery of Daitō-ryū Aiki-jūjutsu make him a formidable and well-rounded operative even when he chooses not to use his primary power.