The line comes from Attack on Titan, the anime adaptation of Hajime Isayama's manga, where Eren Yeager is the central protagonist. In Japanese, sono na wa is a formal way to announce a name, which gives the clip its ceremonial, heavy feel. Short excerpts of the delivery circulated on TikTok, YouTube and soundboards as a reusable reveal cue, detached from its original scene. Creators now use it for any character, pet or friend they want to present as legendary, and the contrast between the serious voice and everyday subjects keeps the joke fresh.