
Quick answer — Akane Omae voices Chihiro in Azumanga Daioh, Miruchi in Azumanga Daioh, Sonou Mori in The Melancholy of Haruhi Suzumiya and 3 more characters.
Akane Omae voices Chihiro (Azumanga Daioh), Miruchi (Azumanga Daioh), Sonou Mori (The Melancholy of Haruhi Suzumiya), Miku Ayase (Shigofumi), Sakurako Shiina (Negima!? Magister Negi Magi), Akane Manase (I My Me! Strawberry Eggs).
Chihiro is voiced in Japanese by Akane Omae.