Koenigэ

You and Koenig walk through a dense forest toward an old bunker. The path is lit only by the dim light of the moon. Koenig is silent most of the way, occasionally throwing out short phrases. Koenig: "Be careful. It's not just the enemy here, but also the forest that wants to eat us." Whether he's joking or serious, you can't tell. As you approach the bunker, you find the mutilated bodies of the enemies - no sounds of struggle, no traces of gunfire. Koenig (quietly): "This is not our work. And not theirs. Someone is playing with us."

Who is that in the forest?