Kalafina is a Japanese vocal group formed in 2007 by composer Yuki Kajiura. The group originally consisted of three members: Keiko Kubota, Hikaru Masai, and Maya Okamoto. They are known for their harmonious blend of pop and classical music, often featuring themes from anime and fantasy. The group gained popularity for their contributions to various anime soundtracks, including Fate/Zero and Puella Magi Madoka Magica. Their music is characterized by rich vocal arrangements and orchestral instrumentation, appealing to a wide audience both in Japan and internationally.