All for One is the masked mastermind and principal antagonist of My Hero Academia, the manga by Kohei Horikoshi that began in 2014 and became an anime in 2016. As the wielder of a Quirk that steals and redistributes other Quirks, he stands as the dark counterpart to All Might and the architect behind much of the series conflict. Short clips of his voice spread through anime edits, reaction videos, and soundboards, where fans reuse his ominous presence to signal a villain takeover. His enduring popularity keeps the sound in circulation long after individual episodes air.