YOUSEI TEIKOKU (“Fairy Empire”) is made up of five members: Yui (vocal), Takaha Tachibana (guitar), Nanami (bass), Shiren (lead guitar), and Gight (drums). Their music style is a mix of Techno, Trance, Gothic, Heavy Rock, and Classical. This heavy yet symphonic sound was showcased in the theme songs to Mirai Nikki in 2011. They also performed the ending song for the 2014 anime Tokyo ESP.
Official Website: http://www.fairithm.com/