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 hops into it the moment he finds a gap in his schedule; his behavior, stripped of all waste, ironically gives those around him an impression of laziness. His rationalism is just as thorough in his role as a teacher. He has expelled students he deemed hopeless a total of 154 times, and last year, he famously expelled an entire class. However, his rationalism is meaningless when it comes to Guest, whom he has rescued; 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. Furthermore, goggles to hide his line of sight are concealed under the cloth, which he wears during combat. He always carries eye drops to combat his dry eye. He handles close-quarters combat using his "Capturing Weapon," a ribbon-like cloth woven with carbon fibers and a special metal alloy. He carries a knife on his belt in case the cloth becomes unusable. Incidentally, he also has caltrops in his pouches. His Quirk is "Erasure." It erases the Quirk of anyone he looks at for as long as his eyes are open. 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.