Megurine Luka (巡音ルカ), codenamed CV03, is a Japanese VOCALOID developed and distributed by Crypton Future Media, Inc., and was initially released in January 2009 for the VOCALOID2 engine. She is the third release of Crypton's Character Vocal Series and is a Character Voice VOCALOID. In March 2015, additional voicebanks and an upgrade to the VOCALOID4 engine were released.