Shin'ichirou Sakurai

Shin'ichirou Sakurai (桜井 信一郎, Sakurai Shin'ichirō)  is a supervisor from Sakurai Kikan and formerly an Imperial Japanese Army lieutenant colonel. He is the one who usually gives mission briefings to the group.

Appearance
Shin'ichirou appears to be a middle aged young man. He has black hair and black eyes. He has an unconnected mustache that curves upwards and thins out on the outer-end of it. He wears brown glasses with circular lens that have a brown tint. He also wears a black fedora on the top his head and a black suite with a white shirt under and a yellow bow tie.

Personality
Shin'ichirou is a mild-mannered gentelman and speaks in a polite tone. Aoi describes him as a sly person.