Chelly was chosen after the auditions held by Supercell alongside with Koeda. It's a waste that Koeda got a little less songs than Chelly, she got that strong voice and she can fluently change from her strong tone to more soft voice. She sung first Guilty Crown opening "My Dearest" which in my option is the most beautiful and awesome opening I heard for years. After that she got to sing only one single that included second Guilty Crown ending "Kokuhaku" and Black Rock Shooter TV ending "Bokura no Ashiato".
Supercell decided to focus more on Chelly. For Guilty Crown anime she sung first ending "Departures ~Anata ni Okuru Ai no Uta~", second opening "The Everlasting Guilty Crown" and insert song "Euterpe". All this songs was under fictional band name EGOIST that was performing at Guilty Crown.
