Aika Ōno (大野 愛果 Ōno Aika, born September 7, 1977) is a Japanese singer and songwriter. She is contracted with the Giza Studio record label[1]

Aika is best known for writing songs for several artists under Giza Studio, notably Rina Aiuchi, Mai Kuraki, Aya Kamiki, U-ka Saegusa in db and Zard, among others. Many of her songs have been featured in anime shows such as Detective Conan (or Case Closed in the US), MÄR, Golgo 13, Detective School Q and Secret of Cerulean Sand. To a lesser extent, she released three studio albums containing cover versions of her own song written for other artists, in English and Japanese.