Ema is an excellent Sniper despite his age, as befits a member of a former A-Rank unit. Although he often goofs off during training, he has the highest individual score among middle school agents. His mentor was Mirai Hatohara, and he possibly received further instructions from Isami Tōma, which would make him the disciple of two of Border's finest Snipers. Tōru Narasaka holds his skills in high regard. Ema's accuracy is so high he can draw a star by shooting at an immobile target. He is also adept at supporting his teammates and at estimating the defensive abilities of his target and selecting the most suited Trigger. Although he is fully capable of sniping through walls with only a Radar, in environments that put Snipers at a disadvantage he can fight at Gunner range very effectively. In one such occasion he was able to select an ideal location as well as the best rifle to score a double kill.
Ema's sniping skills are complemented by unwavering focus, which allowed him to shoot off Osamu's arm while he and the two Attackers of Azuma Unit were shocked by the sudden darkness. In that same match he have given proof of quick thinking when he used the stock of his rifle to create an escape route that did not require him to jump up and thus make himself vulnerable.
Ema uses Ibis against opponents who are able to block Eaglet with a focused Shield, breaking through it. He can land a hit even against highly skilled opponents from a frontal position, despite Ibis's slow bullet speed. It is also his Trigger of choice to snipe through walls and fight at Gunner range. By positioning himself in certain choke points, he can use Ibis' firepower to take out two opponents with a single shot. He has also used its stock to break a glass panel and escape between shots. Ema is first seen using Ibis in Chapter 113 (Episode 69 in the anime).
A Defense Trigger which erects a mobile, malleable barrier in a position chosen by the user. Ema can deploy it quickly to counter trion bullets. Due to the large gap in trion capacity, his Shield was unable to repel Ninomiya's Asteroid despite the latter not using Full Attack. He is first seen using it in Chapter 113 (Episode 69 in the anime).
A default Trigger that shows the position of any trion body within range. Like Bail Out, it does not occupy a Trigger slot and is a standard piece of equipment of all Border agents. Ema uses it to snipe through walls. He is first seen using it in Chapter 171.