Kasane Teto began in 2008 as a Japanese April Fools joke presenting her as a fake new Vocaloid, before fans actually made her sing with the free UTAU software. That prank origin helped her spread across Nico Nico Douga and later YouTube, where her synthesized voice and drill like twin hair became instantly recognizable. Unlike an official Vocaloid release, her enduring popularity came from fan songs, covers and memes. This short name singing clip captures that fan driven history in a few seconds.