君月 士方

Shihou is one of the main characters and a member of the Japanese Imperial Demon Army as well as Hiiragi Shinoa's squad in the Moon Demon Company. 

His sister, Kimizuki Mirai, was infected by the Apocalypse Virus despite being a child. He joined the Japanese Imperial Demon Army, in order to gain their resources and use them to cure her.

He was one of the children that was being experimented on by the Hyakuya Sect to create a weapon of mass destruction, as part of the 'Seraph of the End' plan in destroying the world.

Like Yuu, he worked as part of Shibuya's Military Police until joining the Moon Demon Company. Sergeant Hiiragi Shinoa supervised Kimizuki through the same friendship-making routine in the regular classes as Yuu. He joined the Moon Demon Company class before Yuu arrived.

Owari no Seraph Wiki