Hyo-sei(氷青Hyōsei), born April 21, 1973 in Chiba, Japan, is a seiyū who works for Ken Production. She was formerly credited as Kumiko Yokote(横手 久美子Yokote Kumiko), her real name. When voicing adult games, she is known as Elena Kaibara(海原 エレナKaibara Erena). Hyo-sei will release her first album named "Fuyu Hanabi"(冬花火) on April 21, 2010.