
Quick answer — Mana Hirata voices Asa in Dusk Maiden of Amnesia, Seiya in Sound of the Sky, Natsumi Torii in Nura: Rise of the Yokai Clan and 13 more characters.
Mana Hirata voices Asa (Dusk Maiden of Amnesia), Seiya (Sound of the Sky), Natsumi Torii (Nura: Rise of the Yokai Clan), Ritsuko Iwashita (Baka and Test - Summon the Beasts: Matsuri), Aya Ayano (Another), Hazuki Shimada (Baka and Test - Summon the Beasts), Miho Satou (Baka and Test - Summon the Beasts), Otome Yunomae (Medaka Box Abnormal) and 8 more.
Asa is voiced in Japanese by Mana Hirata.