Eir Aoi launched an impressive career in anime soundtracks with "Memoria"—a soaring, heart-rending anthem for the series Fate/Zero—followed by a string of singles that established her as a major player in the field. Aoi's vocals, both confident and melodic, capture a high-energy J-Pop mood, and a poignantly dramatic streak often defines her performances. Here, delicate keys, cosmic synths and lyrical strings complement overpowering rock arrangements—while ballads reveal her compelling presence in more romantic settings.