Riryka (born January 15, from Sapporo, Hokkaido, Japan) is a Japanese singer-songwriter who belongs to the music collaborative ANGEL NOTE. Her previous stage name, until 2006, was ?????? (Miruku Kurumi), though she began using the name Riryka as early as 2005. She has performed theme songs for a number of video games (mainly adult video games for PC) and animated TV series. She is perhaps best known for her songs "Bravin' Bad Brew" (theme song for the TV series Venus Versus Virus) and "Perfect tears", an image song used in the PC game CLEAR. She released a full-length album in 2008 called Brilliant Sign.