Captured German soldier who communicates with Charlie and warns of the evil in the trenches. After being crucified and spared by Charlie, he mysteriously recovers, guides Charlie to escape, and appears in the epilogue, implying a cyclical supernatural trap.
Their contrasting bodily fates reinforce the trenches' supernatural uncertainty.
Friedrich appears to recover mysteriously, while Colin is discovered to have lost his legs to rats and is euthanized.
Thomas belongs to the armed group controlling Friedrich after his capture.
Friedrich surrenders after the German soldiers are encountered in the trenches. The British unit holds and interrogates him.
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