Kotono Mitsuishi (三石 琴乃, Mitsuishi Kotono; born December 8, 1967) is a Japanese actress and narrator. She was affiliated with Arts Vision and Lasley Arrow, but is now freelance. Mitsuishi lived in Nagareyama, Chiba. She graduated from high school and entered the Katsuta Voice Actor's Academy in 1986. She is well known for her roles as Usagi Tsukino in Sailor Moon series, Misato Katsuragi in Neon Genesis Evangelion, Sayaka Mine in Yaiba, Boa Hancock in One Piece, Murrue Ramius, Haro and Narrator in Mobile Suit Gundam SEED and Mobile Suit Gundam SEED DESTINY, Rena Mizunashi in Detective Conan and Mei Mei in Jujutsu Kaisen.

Kotono Mitsuishi was born on December 8, 1967, in Toda, Saitama Prefecture and raised in Tokyo, Japan. She graduated high school in 1986 and later entered the Katsuta Seiyū Academy. She then debuted as a voice actress in 1989. She is also known for her role of Sailor Moon in the manga and anime series of the same name since 1992. In 2011, she was the voice of Hummy in Suite PreCure.