Eri Kitamura
Four pieces of theme music are used. The first opening theme, titled , is performed by Nana Mizuki and the second opening theme is by Yoko Takahashi. The ending themes used with the respective opening themes are performed by Eri Kitamura and , also performed by Mizuki. The insert song featured in episodes five, nine, and twenty-two is "Necessary", once again performed by Nana Mizuki.