Eri Kitamura : Seira Hoshikawa
Mai Kadowaki : Akari Taiyō
Sora Tokui : Luna Tsukuyomi
Yuiko Tatsumi : Ginka Shirokane

Atsumi Tanezaki :
Itsuki Tendo
Mutsumi Tendo
Nan:e Tendo
Aya Endo : Etia Visconti
Aya Hisakawa : Hinata Taiyo
Ayane Sakura : Fuyuna Shinzaki
Chado Horii : Laplace
Hironori Kondou : Hanayume
Kanehira Yamamoto : Den'ichirō Hakama (5 episodes)
Kikuko Inoue : Ariel Valtiel Westcott
Mao Uchino : Mama Nagataki
Minami Takah:hi : Lymro
Nao Tōyama : Meltina Melvis
Ruriko Aoki : Priscilla Twilight
Shiori Izawa : Schrodinger
Tak:hi Kondo : Cerebrum

Ai Kakuma : Female student (ep 4)
Asuka Minamori : Relative (ep 9)
Aya Suzaki : Cerebrum (girl; eps 5, 8)
Hiroomi Tamaru : Relative (ep 9)
Hiroshi Yanaka : Male voice (eps 9, 11-13)
Hisako Tōjō : Grade schooler (ep 10)
Ikumi Hayama :
Cerebrum (woman; ep 5)
Nursery teacher (ep 3)
Kanami Satou : Nurse (ep 6)
Kanehira Yamamoto :
Guard of Clessidra (ep 12)
Kengo Shinzaki (ep 1)
Store clerk (ep 6)
Katsumi Chou : Butler (ep 9)
Kenta S:a :
Company president Hayakawa (ep 5)
Daemonia (eps 1, 3)
Kotori Koiwai : Minori Murakami (ep 6)
M:uo Amada : Yatarō Shirokane (eps 5, 8)
Megumi Okada :
Ginka's great-aunt (ep 8)
Store clerk (ep 7)
Yukino Shinzaki (eps 1, 12-13)
Mikako Komatsu : Serena Tsukuyomi (ep 9)
Misaki Kuno : Cerebrum (little girl; eps 10-11)
Miyuki Satou : Manami Onodera (ep 6)
Nana Ham:aki : Hanae Mishima (ep 6)
Naoto Kobay:hi : Rioter (ep 10)
Nozomi Yamamoto : Yume Hig:hiyama (ep 4)
Saki Ono : Female student (ep 1)
Saori Hayami : Kiyone Okakura (ep 4)
Saori Hay:hi : Female student (ep 1)
Shinya Takah:hi :
Company president Morita (ep 5)
Deputy Secretary-General Nakazawa (ep 8)
Shuuhei Iw:e : Male student (ep 1)
Taishi Murata : Male student (ep 1)
Tomoyuki Dan : Kōjirō Honda (ep 5)
Yō Taichi : Female student (ep 4)
Yusuke Shirai : Shūji Kishida (ep 4)