Her race's concept as fairies is that they are a special race who can convert 'songs' into 'power'. Kagamine Rin & Len (), codenamed CV02, are Japanese VOCALOIDs developed and distributed by Crypton Future Media, Inc., and were initially released in December 2007 for the VOCALOID2 engine. They can only be seen by a subset of the human population. According to her developers, she has no memory of who she is.' They are the second set of vocals for Cryptons Character Vocal Series and are both Character Voice VOCALOIDs. Vocaloids have come so far that they are now featured in video games, have their own stores and merchandise, and their own concerts. Hatsune Miku: Project DIVA is a series of rhythm games created by Sega and Crypton.
