Jindō Kiriya serves as the primary protagonist and a central figure within the detective group operating in the fictional Geso ward of Tokyo. His primary occupation is that of a high school detective who specializes in incidents arising from a mobile application known as AICis, which grants users supernatural abilities. The setting is a school town environment where the misuse of these powers for selfish desires, violence, and criminal acts has become a recurring issue, and Kiriya's role is to investigate and resolve these cases.

In terms of background, the narrative explores a significant past event that defines his trajectory. Two years prior to the main storyline, Kiriya was held in a research facility, and the story of his relationship with fellow detective Chiyo Izumi originates from this period of confinement. This history is central to understanding his present circumstances and his deep connections to the other characters. Kiriya is identified as male and possesses a distinctive appearance, characterized by multicolored hair and a notable visual feature referred to as "Blinding Bangs".

Personality-wise, Jindō Kiriya is defined by his analytical thinking and methodical, detail-oriented approach to his work. He does not rely on impulsive actions but instead employs systematic investigative tactics to understand and dismantle the cases he encounters. His work consistently demonstrates a motivation to understand the origins of the AICis app and the full consequences of the powers it bestows, including the hidden costs or specific requirements that may be tied to each individual's ability. He confronts users who violate ethical boundaries, aiming to curb the escalating chaos and restore stability within his community.

Relationships are a key component of his character development. He works closely with fellow detectives Fuuka Minase and Chiyo Izumi as part of a dedicated unit focused on power-related incidents. The bond with Chiyo Izumi is particularly significant, as their shared past from the research facility forms a foundational element of the narrative and deepens his personal stakes in the ongoing conflicts. Kiriya's development is traced through his collaborative efforts with his team to identify and neutralize dangerous individuals who exploit their AICis-granted powers. His journey involves not only solving immediate cases, such as apprehending a student named Kouji Hirayushi who used shape-shifting abilities for unauthorized access, but also persistently seeking the greater truth behind the app itself. While his direct supernatural abilities are not explicitly detailed, his notable capability lies in his sharp deductive reasoning and his functional role as the detective who pieces together the limitations and mechanics of various powers to stop their abuse.