Hitomi Nabatame. Madly in love with her voice acting.
Her list of extensive work is slightly disturbing....but some of my favorite roles:
Shizuma - Strawberry Panic
Eriko - Girls High
Eriko - Maria Watches Over Us
Sena - Chaos;Head
Kanade - Candy Boy
Kanade - Best Student Council
and the awesome sauce Nogizaka Haruka no Himitsu OP tracks are legit.