Birth Name: 三石 琴乃
Age: 46, born 8 December 1967
Country of origin: Japan
Relationship Status: Married
Prolific Japanese voice actress from Tokyo. As a young girl, Mitsuishi lived in Nagareyama, Chiba. Mitsuishi graduated from high school in 1986, and entered the Katsuta Voice Actor's Academy. While attending the academy, she began working part time as an elevator girl in the Sunshine 60 building. Afterward, she found a position as an office lady, but because of taking too much time off, she was forced to quit.
In 1988, Mitsuishi made her voice acting debut as Tomoyo in the OVA Ace