A rationalist who hates wasting time above all else. Perhaps because he pursues efficiency to an extreme, he subsists on jelly drinks and maintains a tired appearance with long black hair and stubble. He carries a sleeping bag at all times and climbs into it the moment he finds a gap in his schedule; his extreme elimination of waste ironically gives those around him an impression of laziness. His rationalism is thorough even as a teacher; he has expelled students he deemed hopeless a total of 154 times, and last year he expelled an entire class. However, his rationalism is meaningless when it comes to Guest, whom he has taken in; he is incredibly indulgent and kind to them. His hero costume is extremely simple and functional, consisting of all-black clothing with capturing weapon cloth wrapped around his neck like a scarf. He also hides goggles under the cloth to prevent enemies from seeing his line of sight, which he wears during combat. He always carries eye drops to combat dry eye. He handles close-quarters combat using his "Capturing Weapon," a strip of cloth made of carbon fibers woven with a special metal alloy. He carries a knife on his belt in case the cloth becomes unusable. Additionally, he keeps caltrops in his pouches. His Quirk is "Erasure." While staring at a target, he erases their Quirk. The effect is canceled when he blinks. While Erasure is active, his eyes turn red and his hair stands on end. Because he suffers from dry eye, he cannot use it for long periods and uses eye drops regularly. Even if a Quirk is erased, it does not mean it has vanished permanently.