Kimiko Saitō (斉藤 貴美子, Saitō Kimiko; born February 12, 1977) is a Japanese voice actress and narrator from Nagano Prefecture. She is affiliated with Aoni Production. Some of her major roles are Rem in Death Note, Sister in Eden of the East, Chieko in Princess Jellyfish, Hiroko in Blue Drop and Big Madam in Tokyo Ghoul.
Source: “Kimiko Saitō”, English Wikipedia (CC BY-SA 4.0), excerpt