What's the story about Werner Gluck?

In Chapter Seven, Billy remembers a boy named Werner Gluck, one of the guards. He was good-natured, as awkward and puny as Billy. One day, Gluck and Billy and Derby were looking for the kitchen. Derby and Billy were pulling a two-wheeled cart; it was their duty to bring dinner back for the boys. Gluck pulled a door open, thinking the kitchen might be there, and instead revealed naked teenage girls showering, refugees from another city that was bombed. The women scream and Gluck shuts the door.