
Quick answer — Chiharu Tezuka voices Reika Yamamoto in Serial Experiments Lain, Yukari Kashima in Vampire Princess Miyu (TV), Johnny McGregor in Beyblade and 1 more characters.
Chiharu Tezuka voices Reika Yamamoto (Serial Experiments Lain), Yukari Kashima (Vampire Princess Miyu (TV)), Johnny McGregor (Beyblade), Misaki (The Devil Lady).
Reika Yamamoto is voiced in Japanese by Chiharu Tezuka.