Who is Sturm from Black Cross and what is their importance? Black_Cross_(novel) English & Literature Sturm | Black Cross

Sturm is a greedy man who has been previously caught looting the prisoners of the camp for his own personal gain. When Marcus Jansen is selected for execution, his father tries to buy his freedom by placing diamonds into Sturm's pocket, but is caught by Schorner, and Sturm is forced to throw the diamonds out into the snow. Sturm seeks retaliation against Schorner by abusing Rachel at his every opportunity.