Mirai Kimizuki

Mirai Kimizuki is the younger sister of Shihō Kimizuki. She was infected with the Apocalypse Virus despite being a child and is being treated in a hospital. Shihō joined the Japanese Imperial Demon Army in order to gain access to the military resources that are needed to cure her as the virus cannot be treated in civilian hospitals.

Trivia

 * Mirai could mean "Future".
 * Kimizuki means "Your moon".