This sound is generally associated with Ryuko Matoi from Kill la Kill, the 2013 anime series that became popular online through clips, edits, and fan compilations. Short assertive lines like this spread well because they are easy to reuse in reaction videos and anime memes. The clip stays relevant because it fits both sincere hype edits and ironic posts where confidence is immediately undercut. It is often grouped with other recognizable anime reaction sounds such as anime ahh or To be Continued.