Kurokawa is a Border agent with the elite Tamakoma Branch. Originally from the Neighborhood, Kurokawa grew up outside Mikado City before arriving and joining Border. This background grants extensive firsthand knowledge of Neighbor societies, technologies, and tactics, establishing Kurokawa as a valuable specialist within Tamakoma.

Personality is typically calm, reserved, and highly observant. Kurokawa speaks formally, maintains a composed demeanor, and rarely displays overt excitement or agitation. A strong sense of duty and loyalty to the Tamakoma Branch and its members is central. While generally stoic, Kurokawa exhibits intense focus and determination during combat.

Within Border, Kurokawa serves primarily as an Attacker. Combat proficiency centers on skilled use of the Kogetsu sword trigger and the Scorpion blade trigger, emphasizing precision, agility, and leveraging Border triggers' unique properties effectively against Neighbor threats.

Kurokawa frequently operates as part of Tamakoma teams, providing crucial tactical support and Neighbor expertise during missions. This includes analyzing enemy technology, anticipating Neighbor strategies, and advising teammates on effective countermeasures. Kurokawa's deep understanding often proves critical in complex engagements.

Character development involves gradual adaptation to life within Mikado City and Border's structure. While maintaining Neighbor heritage as a core aspect of identity, Kurokawa demonstrates increasing integration and commitment to protecting the city and its inhabitants. Interactions with other agents, particularly within Tamakoma, showcase a growing sense of camaraderie and belonging.

Kurokawa actively participates in critical operations, including major battles against invading Neighbor forces and the away mission to the Neighborhood. During the expedition, Neighbor origins facilitate communication and navigation within the hostile environment, proving indispensable to the mission's objectives.