UTAU is actually a plan by an evil mastermind to gather all voices in the planet.

TVtropes wrote:Because Yamaha, whoever made UTAU, and some anime studio will partner and make a High School Spinoff Anime, called Song Academy, where the official Yamaha ones will be the main characters (including the dreaded non-Japanese ones, with Sweet Ann as the English teacher), their opensource counterparts will be secondary ones (with the exception of Kasane Teto, that became kinda popular, even more than the friggin' Default-ko), most popular fancharacters, like Akita Neru and Yowane Haku will make their (usually comedic) appearances; and all the not so popular ones will be background, or single shot characters. Unless, of course, they are held high in popularity polls.