Her real name is TANAKA Kaori (田中 香). She adopted "Clio Saga" (嵯峨 栗生) as her pen name for several years before changing it to "Soraya Saga" (嵯峨 空哉) circa 2001 (though she is also sometimes credited under her birth name). She worked for Square for many years, serving as a map designer on Final Fantasy V and Final Fantasy VI. She also created the Final Fantasy VI characters Edgar Roni Figaro and Mash Rene Figaro (renamed Sabin Rene Figaro in the English version of the game), and wrote their backstories and dialogue. Along with Tetsuya Takahashi, she is a co-creator of Xenogears.

She is married to TAKAHASHI Tetsuya (高橋哲哉), and has two children; she lives in Tokyo.