Takumi Kuruya operates as an information broker in Tokyo's Shinjuku Ward, wielding drones and hacking skills to gather data for clients ranging from contract killers needing corpse disposal or target tracking to a fortunetelling business collecting client intel during sessions, acting under his superior Lisa Kuraki's directives. His surveillance network, powered by a server farm and aerial drones, blankets large sections of Shinjuku.
He has short brown hair and visible scars on his back. Takumi constantly wears black-purple-and-white VR goggles permanently concealing his eyes, a trait rooted in past trauma. Standing 170 cm tall, his typical attire is a one-shoulder black tee with white stripes over a black tank top, shorts, and flip-flops, sometimes paired with black headphones featuring green accents.
Personality-wise, Takumi initially values his own survival and lifestyle above societal laws or others' lives, readily admitting he would betray friends under threat—a behavior stemming from past trauma. He evolves into the logical, practical, and often blunt voice of reason within his trio alongside the Corpse God and Misaki Sakimiya. He is cynical and dismissive of social hierarchies, showing no deference to wealth or status, and demonstrates resourcefulness under pressure. Eccentricities include sentimental attachment to his drones and delight in conceptualizing himself as an "identification wizard." He reacts vehemently to romantic advances and becomes uncomfortable when teased about physical affection.
His background reveals a history as a "boy genius" who founded a software company at fourteen, only to see it taken over by adults. This led to a forced double suicide attempt that shattered his family and plunged him into crime. He joined the street gang "Sons of the Styx" (also called "The Hungry Dead of Sanzu") as an information broker and gofer. The gang's destruction occurred when detective Gōzaburō Arase killed eight members; paralyzed by terror, Takumi betrayed his comrades to survive. This event entrenched a deep distrust of reality, causing him to perceive life through his goggles as a game. He later affiliated with Lisa Kuraki's freelance agency but remained fearful of her authority.
Key present events include witnessing the Corpse God's resurrection in Polka Shinoyama's body via drone feed, leading to his assignment as the Corpse God's handler. He observed Misaki Sakimiya's death and reanimation, facilitated the Corpse God's navigation of modern Tokyo, and supported the fortunetelling business through illicit data collection. His technological interventions repeatedly aid the group, such as guiding the Corpse God to a fire rescue and providing real-time surveillance during confrontations. He confronts allies over damaged equipment, demands compensation, and engages in strategic discussions about territorial conflicts involving abandoned supernatural sites.
Takumi's character development involves gradual healing from past regrets through his partnership with the Corpse God and Misaki. He transitions from a self-preserving loner to a more dependable ally, demonstrating willingness to accept responsibility for illegal acts to protect others and exhibiting increased assertiveness in negotiations. Despite lingering fears of figures like Gōzaburō Arase or his former gang leader Kuon Higuro, he displays emerging loyalty, notably intervening when others attempt to exploit the Corpse God's naivety.