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 part of the Character Vocal Series and is a Character Voice VOCALOID. In March 2015, additional voice banks and an upgrade to the VOCALOID4 engine were released. She was the third release for Crypton's VOCALOID Character Vocal Series.

Her voice is provided by the Japanese voice actress and singer, Yū Asakawa (浅川悠 / Asakawa Yū), who was recorded in Japanese and English for the voice bank.