A Japanese VOCALOID developed and distributed by Crypton Future Media, Inc., and was originally released for the VOCALOID2 engine on December 27, 2007. She is the second of the Character Vocal Series together with Kagamine Len and is an official PIAPRO character.
Her counterpart is Kagamine Len. Their relationship (whether they are siblings, lovers, etc) is officially left ambiguous and left up to the user to decide.
She is voiced by Shimoda Asami. She was originally designed and illustrated by KEI for her V2 voicebank. Her V4X voicebank follows a similar outfit with readjustments designed and illustrated by iXima.
