Kumiko Yokote (横手 久美子, Yokote Kumiko, born April 21, 1973 in Chiba) is a Japanese voice actress and singer who works for Power Rise under the alias Hyo-sei (氷青, Hyōsei).
Hyo-sei released her first album titled Fuyu Hanabi (冬花火) on April 21, 2010.
After a free period, she moved to the Toritori Office in August of the same year.
With the start of activities as a singer in the spring of 2004, she changed her artistic name to Hyo-sei.
Since 2009, she has been active as a vocalist for the milleluci unit based on Showa Kayo / Bossa Nova, and since 2016 the band's name has changed to Sen no Akashi.