Iwao Oguro, famously known as the unlicensed vigilante Knuckleduster, is a 49-year-old, quirkless mountain of a man who protects the gritty streets of Naruhata. Formerly the high-speed Pro Hero O'Clock before his Quirk was stolen by All For One, he now relies entirely on peak human conditioning, brilliant tactical deduction, and a pair of silver brass knuckles to brutally take down local gangs and users of the drug Trigger.