EGOIST is a fictional band that was created for アニメ Guilty Crown with vocals provided によって Chelly and lyrics provided によって leader of Supercell, Ryo.
About Chelly: From May 25th to June 19th, 2011, Supercell held an audition to find two new guest singers for their group. From over 2000 candidates,17 年 old Chelly and 15 年 old Koeda were selected to be Supercell's new singers. Chelly sung the vocals for Yuzuriha Inori (Guilty Crown) in their fictional band named 'EGOIST'. She is a good friend of Koeda and It has been noted that Chelly loves to draw. She was born on 12 April, 1994.