Eir Aoi (Japanese: 藍井 エイル, Hepburn: Aoi Eiru, born November 30)[1][2] is a Japanese singer from Sapporo, Hokkaido, signed to Sacra Music. After being discovered through the Japanese video sharing website Niconico, Aoi made her major debut in 2011 with the release of her first single "Memoria",[3] whose title track was used as the first ending theme to the 2011 anime television series Fate/Zero. Aoi's music has been featured in various anime television series such as Sword Art Online, Kill la Ki ...