Kōji Oki/Abilities

As a member of a unit with a stable standing in the upper tier of B-rank, Oki is a capable Sniper. Osamu Mikumo listed him as one of the three fighters to watch out for during round six, with the likes of Tatsuhito Ikoma and Kazuaki Ōji. He is confident enough in his abilities to think that he would be able to snipe Yūma Kuga and to take aim and fire at Chika Amatori within such a small interval after her own shot that she would be unable to defend. Despite his proficiency, Oki is unable to hit foes as agile as Yūma or Ōji after his position becomes known, although he was willing to try against Yutaka Kashio. Apart from picking off opponents, Oki's contributions to his team encompass suppressive fire and counter-sniping. He is also responsible for discovering the identity of the owner of a trion signature and, when possible, to keep track of Bagworm users, exploiting the vantage points he can reach more quickly than most Snipers thanks to Grasshopper. The above-average mobility this Trigger grants him might be connected to his apparent reluctance to change position after every shot, as it allows him to keep away from pursuers over short distances; nonetheless, he will move to improve his chances of catching the target unawares.

While this approach to sniping can cause him to be tracked down with relative ease, Oki is adept at remaining undetected if the circumstances call for it. His aptitude for stealth was compared to that of the notoriously elusive Kazuto Tonooka during round eight. Switching targets to the enemy Sniper, whom he successfully forced to bail out, was regarded as an astute move, as not only Oki took the danger of losing sight of Tonooka into account, but he also surmised that his previous targets would not give him an opening. Albeit advanced, his ability to analyze the outcome of a shot by factoring in the target's reaction time, distance and muzzle velocity is not flawless, as Yūma managed to survive his pickoff attempt, although he still lost an arm. Oki's knowledge of Border Triggers is extensive enough for him to have developed a tactic to avoid Hound, as well as to recognize Hornet when it fails. His ability to survive the long-distance barrage unscathed, however narrowly, also vouches for decent reflexes, adaptability, and speed at switching Triggers.

Although Oki claims to struggle to snipe younger girls, the veracity of his sentiment is disputed by anyone he expresses it to, and in fact he is willing to shoot; contrary to his assertion, his failure to take out Chika in round six was attributed to his loss of focus when she unexpectedly opted for a mutual hit.