TV-Series
Description
Kaoru Namikido serves as the deputy captain of the Nerima Reconnaissance Unit, holding a position of significant responsibility within the Oni Agency. Born on December 2nd, he maintains a public-facing identity as the owner of a secondhand bookstore, which provides a cover for his covert activities. In this civilian role, he discreetly exchanges information with other oni using coded messages.

In terms of appearance, Kaoru has short, black hair that he styles to one side, with an undercut on the opposite side, and his eyes are deep-set with pinpoint pupils. A noteworthy personal detail is that he is a secret admirer of Naito Mudano, going so far as to style his hair in deliberate imitation of Mudano's look as a sign of his respect. His standard uniform for duty is the Patrol Unit's black bomber jacket and high-top sneakers.

Kaoru is known for his calm, mild-mannered, and affable personality, which makes him approachable to others. He is friendly, reliable, and serves as a patient instructor, especially to younger characters like Shiki Ichinose and his team, teaching them about the workings of the Oni Agency and the lifestyles of oni. Despite this gentle demeanor, he possesses a sharp wit and can deliver barbed, sarcastic remarks, a trait that rivals the sharp tongue of his superior, Masumi Yodogawa.

His primary motivation stems from a deep sense of loyalty and dedication to his duties and friends, particularly his long-standing support for Masumi Yodogawa, whom he has served as a steadfast right hand for many years. This loyalty is profound; after Masumi loses a leg in battle, he entrusts the future of the reconnaissance unit to Kaoru, demonstrating the strength of their bond and the high level of trust placed in him.

Kaoru plays a pivotal role within the story, particularly during the decisive battle in the Nerima arc. Here, he is entrusted by Naito Mudano to supervise Ikari Yaoroshi and the others as they battle against Osuke Momokado. His tactical awareness is highlighted when, after the battle concludes, he immediately senses the approach of enemy reinforcements and makes the critical decision to prioritize his team's escape, leaving the unconscious Osuke behind to evacuate to an underground hideout. Following this battle, when Masumi is despondent over his injury, Kaoru is offered leadership of the unit, though the transfer is ultimately canceled when Masumi is healed. Later, during the Koenji arc, he joins the battle in the Suginami district alongside Masumi, taking charge of rescuing oni under his commander's orders while also using Oni Agency information to investigate the identity of Juji Yusurube.

Kaoru's key relationships define his role in the narrative. He acts as a mentor to Shiki Ichinose, guiding him and his group through reconnaissance duties and offering insights into frontline activities. His partnership with Masumi is a reliable and deeply loyal one, acting as his valuable subordinate for many years. While he is a secret fan of Naito Mudano, his most prominent working relationship is with the reconnaissance team, whom he supports and protects.

His notable ability is a unique form of ultrasound generation. To activate it, he shakes a vial containing his own blood, which produces ultrasound waves. By analyzing the returning echoes, he can precisely determine the layout of a building, the number of people within it, and their specific locations, making the power exceptionally useful for reconnaissance missions. This ability has a time limit of approximately two hours per use. An important aspect of this power is that he can share the vial with others, granting them temporary use of his ability; however, for those with lower intellectual capacity, the overwhelming flood of sonic information often results in severe nausea or vomiting.
Cast