TV-Series
Description
Kazuaki Oji is a B-Rank Attacker who serves as the captain of Oji Squad in Border, the organization dedicated to defending Mikado City from Neighbor threats. He is a perceptive and highly analytical individual whose strategic mind is one of his most defining traits. Oji has a habit of giving people unusual nicknames and carries himself with a princely demeanor, a purposeful affectation that plays on his surname, which means prince in Japanese. This self-styled persona is so deliberate that he once requested his squadmate draw icons depicting him as a handsome figure wearing a crown for use during strategy explanations. In a piece of meta-commentary, the series author has noted that Oji must be a bit foolish to portray himself in such a manner.

Motivationally, Oji appears driven by a desire to lead his own team and achieve success through well-crafted tactics. He originally was a member of Yuba Squad but left alongside Kazuki Kurauchi to form Oji Squad, seeking a team of his own while still remaining on good terms with his former captain. His role in the story is primarily as a rival and a benchmark for the protagonist team, Tamakoma Second. As the captain of a top-tier B-Rank squad, he frequently participates in rank wars, where his strategic acumen and combat skills are put on full display. He is often shown analyzing battles, both as a participant and as a commentator, where his deep understanding of tactics is highlighted.

Oji maintains several key relationships that inform his character. Within his own squad, he works closely with Kazuki Kurauchi, a calm and knowledgeable shooter who has been his teammate since their days in Yuba Squad and who clearly respects Oji's leadership. He also shows faith in the abilities of his younger teammate, Yutaka Kashio. Outside his squad, he has a notable dynamic with Osamu Mikumo of Tamakoma Second. Oji regards Osamu not as a weak link, but as a considerable threat whose strategic thinking must be neutralized as a top priority. During a rank war, he confronts Osamu directly and defeats him decisively, while also offering harsh but insightful commentary on his inexperience. In a later battle where he acts as a commentator, he shows a nuanced understanding of Osamu's strategies, almost rooting for him and internally referring to him by the nickname Ossamu, while lamenting that only a lack of experience as a shooter held him back.

Throughout the series, Oji demonstrates notable development primarily in his tactical evolution. He is consistently portrayed as a quick thinker capable of devising multiple contingency plans and adapting to unfolding situations in real-time. During the B-Rank Wars, he showcases his ability to predict opponent movements, including those of the unpredictable Tatsuhito Ikoma, whose squad he has fought many times. Later, in the Away Mission Test arc, he is selected to captain a mixed squad, further cementing his status as a capable leader and strategist within Border's upper ranks.

In combat, Oji possesses a versatile and tricky skill set that makes him a formidable opponent. He is a left-handed Attacker who primarily wields the Kogetsu, which he is skilled enough to use with only one hand, freeing his right hand for other actions. To augment his close-quarters capabilities, he also carries Scorpion, which he uses effectively for surprise attacks from hidden or extended positions. Defensively, he equips the standard Shield and uses Bagworm to conceal his presence from enemy radar. What makes Oji particularly dangerous is his proficiency as a Shooter with the Hound trigger, a homing bullet type, despite not being officially classified as an All-Rounder. All members of Oji Squad use Hound, making them exceptionally threatening in group fights in open areas. Oji himself has demonstrated a high degree of control over the bullets, scattering them in a circle around himself, firing at two targets simultaneously, and even planting bullets in a hidden location with a delayed activation to set traps. Combined with his reputation as a top-level runner capable of quickly crossing the map and his analytical ability to guess enemy positions, Oji is a tactical fighter who uses intelligence and skill to control the flow of battle.
Cast