Blood type: O
Birth place: Chiba Prefecture, Japan
Saori Oonishi is a graduate of Nihon Narration Engi Kenyuujo (NichiNare) and debuted as a seiyuu in 2012 under the I'm Enterprise agency.
Oonishi's first work was as an extra voice in the second drama CD of Penguin Enishi. Her first anime role was in AKB0048.