
Quick answer — Kaori Yamagata voices Lilly in Rainbow, Oshidori Maniwa in Katanagatari, Masayo Komatsuzaki in From the New World and 5 more characters.
Kaori Yamagata voices Lilly (Rainbow), Oshidori Maniwa (Katanagatari), Masayo Komatsuzaki (From the New World), Naomi Miwa (Summer Wars), Kochou (The Story of Saiunkoku), Misa Hamai (La Corda D'Oro: Primo Passo), Miu no Haha (Bungaku Shoujo), Mizue Hamasaka (Strawberry Panic).
Lilly is voiced in Japanese by Kaori Yamagata.