My Hero Academia began as a manga by Kohei Horikoshi before becoming a long running anime series, with Izuku Midoriya as its earnest young hero in training. In the English dub the character is voiced by Justin Briner, whose energetic delivery made short lines like this yes easy to lift as reaction audio. Fans began clipping brief dub moments for edits and soundboards because they work without context, and this one has stayed popular as a clean, positive response that reads instantly in memes, streams and short form videos.