「テトコレ」 by (CAFFEIN)

During a NicoNico Douga live stream celebrating Teto Day (10/10), it was announced that Sega would be releasing a DLC module of the UTAU virtual diva, Kasane Teto, for their PSP rhythm game, 「Hatsune Miku – Project DIVA 2nd」.

The twin drill sensation will be available for download on PSN starting 10/11 — priced at 300 yen.

*Character Info:

Kasane Teto was created as an April Fools joke by the VIPPERs of 2ch, meant to trick Nico-Nico Douga users into thinking she was the 3rd Vocaloid from Crypton.

She is a young girl with red eyes and red hair that she keeps up in drill-like twintails. She typically wears a dark blue/gray outfit with red trim. Her official profile lists her as a “chimera”, so she is sometimes given characteristics like a forked tail or wings. Her character item is a loaf of french bread.

After the joke was over, instead of fading into obscurity Teto was picked up by UTAU, a freeware knock-off of VOCALOID. She has maintained a level of popularity, and many have tried to replicate this effect with other joke and fanmade characters since.

*Promotional Video:

[Source]