Guilty Crown
In 2011, Ryo of Supercell was tasked with composing theme music for the anime television series "Guilty Crown". That year, Supercell held auditions from May 25 to June 19 for the vocalist on the band's third studio album "Zigaexperientia" (2013), and Ryo was also searching for the vocalist of Egoist, a fictional band featured in "Guilty Crown". Out of about 2,000 candidates, then 17-year-old female singer Chelly was chosen to sing under the persona of the band's vocalist Inori Yuzuriha. Egoist's debut single was released on November 30, 2011; the song was used as "Guilty Crown" first ending theme.