Isao Takachiho 高千穂勲

Yukina's older brother. He was a member of the Kwantung Army but disappeared without a trace along with the platoon he was in charge of in Manchuria, which forces Yukina to search for him. It is revealed that he has been acting in accordance to his own take on Pan-Asianism and becomes the enemy of Sakurai Kikan. He also has an unknown ability.