As the captain of an A-Rank unit, Miwa is a capable agent and endowed with good leadership skills. Due to his Triggers giving him an advantage over Alektor, he was able to fight on par with a Hairein for an extended period, and managed to injure both him and Mira, another Black Trigger user, when she joined the fight, using information gathered by Karasuma and on one occasion Replica's assistance. Miwa is an All-Rounder, and as such possesses a flexible fighting style. His favored distance is often troublesome to the opponent, because it is neither close nor mid-range, but he can also easily switch to any of the two. The fact that he can efficiently use the Lead Bullet is proof of his skills, as it requires the agility of an Attacker as well as the ability to shoot while on the move. He seems to be a valued strategist, as both Izumi and Tōma, despite their higher rank, relied on him during their fight against Arashiyama Unit, and Arashiyama stated that his opponents' next action would be decided by Miwa.
Miwa's most used offensive Trigger is the Asteroid. Firing it through his handgun, he can fight both at mid and close range, as this type of weapon can be used with just one hand. He seems to be a very skilled Gunner, matching Arahiyama and Tokieda in a gun fight with Izumi's assistance.
Miwa's swordsmanship is first class. He swiftly draws it and approaches the enemy to get past their defenses when the Asteroid is not sufficient. He has shown to be able to attack continuously while moving and dodging, even from very difficult positions. His style consists in slashing at the opponent as soon as he gets into range, using a fast paced barrage of attacks that leaves the enemy no room to retreat or counter at their preferred pace. He can also wiled Kogetsu together with his handgun to expand his options.Hairein commented that even though Miwa knew about Alektor, it was still impressive that he managed to cut him. Miwa first uses Kogetsu in chapter 14 (episode 7 in the anime).
Miwa's Lead Bullet is an improved version: a single shot assigns a burden of 100 kilograms. He uses it in conjunction with Asteroid to slow down or restrain an opponent, thanks to its ability to not interact with incorporeal Triggers, such as Border's Shield and Alektor's bullets. However, in return, it consumes a large amount of trion and has very low range and bullet speed, requiring the user to be close to the target and possess the agility of an Attacker and the ability to shoot while moving, further highlighting Miwa's skills. Thanks to the customization, he can also use other Triggers while firing it, and also shoot through his own Shield.
While Miwa seems to prefer dodging attacks or taking cover behind structures, he used this Trigger in melee to fight Hairein. On that occasion, he demonstrated the capacity to divide it into a myriad of smaller Shields to defend against Alektor's bullets, without them hindering his swordplay.
Miwa can produce about 6 ribbons of light with Fujin. With Replica's directions, he managed to hit a fast-moving target outside his line of sight, demonstrating great control over his movements. Miwa uses it during the Large-Scale Invasion to defeat Hairein, but ultimately decides not to keep it and to stay with his unit.