ディルク＝ベルンシュタイン

The protagonist of the story, a military intelligence officer.
His rank is Major.

He has frontline experience and is a holder of the Silver Melee Medal.
He ended up being transported to this world with his unit from Europe in 1945.

Together with the researchers he has gathered, he has developed various interrogation and torture devices and methods.

He is also quite a sadist, and feels strong sexual arousal from restraining and torturing people, and then seeing this transform into pleasure.
He often takes the initiative in interrogating women, especially.