
Quick answer — Rie Saitou voices Daichi Sawaguchi in Den-noh Coil, Re-l Mayer in Ergo Proxy, Tokine Yukimura in Kekkaishi and 2 more characters.
Rie Saitou voices Daichi Sawaguchi (Den-noh Coil), Re-l Mayer (Ergo Proxy), Tokine Yukimura (Kekkaishi), Inaho Azuma (Yakitate!! Japan), Buzz's Wife (Parasite Dolls).
Daichi Sawaguchi is voiced in Japanese by Rie Saitou.