Aoi Tada (多田葵 Tada Aoi?, born 3 July 1981 in Tokyo) is a Japanese singer and former voice actress. She formerly belonged to Gekidan Himawari. She also performed an insert song to the series, "Wo Qui Non Coin". In March 2005, she signed on to Moon-Bunny Entertainment and began her singer-songwriting career. She has performed the theme songs for Gunslinger Girl: Il Teatrino and Angel Beats!. She is also affiliated with the group Veil. She is credited for her Veil-related songs as Veil ∞ Aoi.