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Characters!
I have been thinking how to avoid spoilers in the character descriptions. But for some of the characters who appear later, spoilers are actually unavoidable. Therefore, I have decided to sort them according to which volumes they first appear in. Nevertheless, I will try to avoid unnecessary spoilers.
Volume 1
Masashi Daihama
Hideyuki Okakura
Kouji Rokumasu
Saori Kawai
Chisato Wakajima
Homunculus Mita
Homunculus Saruwatari
Homunculus Kawazui
Homunculus Washio
Homunculus Hanabusa
Volume 2
Volume 3
Dr. Butterfly
Moonface
Tai & Shii
Volume 4
Mayumi Hayasaka
Volume 5
Victor Powered
Volume 6
Sekima Hiwatari
Chitose Tateyama
Volume 7
Genji Ikusabe
Shinobu Negoro
Madoka Maruyama
Hanaka Busujima
Rintarou Inukai
Volume 8
Shousei Sakaguchi
Volume 9
Alexandria Powered
Victoria Powered
Volume 10
Nishiyama