Gunhead is a wide-set man of a muscular build with long, pale mint-green hair that spikes backwards, away from his head.
In his hero costume, he wears a white mask with four holes in a square formation, all resembling gun muzzles with slight barrel stems protruding from their side, the only exception being the bottom left one, which instead just holds the appearance of a regular circle. He wears a partial bodysuit of a dark grayish-cyan color, only covering the lower portion of his torso, his arms from the shoulders down and the palms of his hands. A padded combat vest sits over this, around the sides of his chest, and is kept in place by two straps that connect his mask and shoulders. He also sports plain brown pants and short black boots, as well as his signature revolver chamber-shaped silver bracers and spikes on his knuckles.
Gunhead is a very professional and friendly individual with values that make him a great teacher. In a fight, he's composed and fierce, but otherwise, he tends to be unexpectedly kind to people.
On the first day of field training, Gunhead takes Ochaco out on patrol. He explains to her how heroes are and that his hero office specializes in clamping down on crime. They receive a commission based on their acts of heroics after they are called in by the police.
Gunhead uses the next day to instruct Ochaco and others on a proper fighting form. Later on after the Hosu City incident, Gunhead notices Ochaco on the phone speaking with Izuku Midoriya. He tells her another training session is about to begin and then teases her about talking to a boy.
Later on, Gunhead trains Ochaco on fighting an opponent armed with a knife. She uses a fake dagger to attack Gunhead, but his movements are too fluid for her to hit him. He eventually takes Ochaco down, explaining how he did it all along the way.
Once the internship comes to an end, Ochaco returns to school and tells her classmates that learning Gunhead's martial arts was very worthwhile.
Ochaco attempted to intern under him again, but he was busy.
This Quirk is very capable in short-range combat, so this Quirk is mainly used as suppressive fire.