Sagiri is the commander of the 1st Tactical Armor Regiment, a prestigious position granted to IJA/MDF troops tasked to protect the capital of Japan, Kyoto. In the past, Sagiri was a close friend and loyal subordinate of Lieutenant-General Ayamine Shuukaku, Kei's father, and was even engaged to Kei at one point. After the Gwangju Incident, Shuukaku was labeled responsible and punished for that failure, which destroyed his faith in the Japanese government. After the bombing of his hometown during Operation Lucifer, his lack of faith turned into rage.
