Quick answer — Yuka Koyama voices Yoko Yamaguchi in Pale Cocoon, Yuka Kanzaki in GOLDEN BOY, Miyako Miyazawa in His and Her Circumstances and 4 more characters.
Yuka Koyama voices Yoko Yamaguchi (Pale Cocoon), Yuka Kanzaki (GOLDEN BOY), Miyako Miyazawa (His and Her Circumstances), Mitsuki (Tenchi Muyo! Tenchi Universe), Jinny Golding (Marmalade Boy), Youko Danma (Shounan Junai Gumi!), Kazuko Kuhouin (Kurenai).
Yoko Yamaguchi is voiced in Japanese by Yuka Koyama.
