A new Vocaloid has been announced, Sukone Tei, offering “clear and sweet” vocals which are “lightly eccentric.”
The announcement resides here.
However, clicking Tei or paying attention reveals the true state of affairs, which can also be seen by clicking here.
According to her secret character introduction she already plans to kill Hatsune Miku and exhibits an unhealthy fascination with Kagamine Len, so it is perhaps better she is never released…
A yandere Vocaloid? Sadly not – it is all an inspired ruse by the denizens of 2ch’s VIP board (in the “Guys, let’s make up a Vocaloid and troll all the Vocaloid maniacs!” thread), although it can hardly be called fake as the announcement is by “CrVIPton” and not “Crypton.”