Koike Eiko, born November 20, 1980 in Shimokitazawa , Setagaya, Tokyo, Japan is an actress and idol currently affiliated with Yellow Cab (イエローキャブ). Outside of Japan, her best-known work is the film 2LDK. She has worked as a ringside commentator and spokesperson for Japan's PRIDE Fighting Championships from 2000 to 2006. Her husband is pro wrestler Sakata Wataru.

Profile @ Yellow Cab:
http://www.yellow-cab.co.jp/talent/koike.html

(Source: AniDB)