Hatsune Miku is the Vocaloid character released by Crypton Future Media in 2007 who became a central figure in anime and internet music culture. The coomer label comes from slang memes mocking obsessive online attraction, and editors paired that joke with Miku's innocent synthetic image for contrast. This version circulated from a YouTube upload and spread through soundboards, TikTok edits and Discord servers where users drop it as shorthand for exaggerated fandom. Its popularity lasts because the character remains instantly recognisable worldwide.