Just when they thought there couldnt be a creature as unexplainable as Dan...
Unfortunately, Engel and Killing arent quite ghosts or “spöken” as Dan would call them. They are simply reflections of the Milky Way, a vast river of a troop of spirits, on visible in places where there isnt much light pollution, like the northern region of Sweden, or anywhere that isnt the south of Sweden (like Nyänget). When Engel and Killing died in a sauna, they rose up though the gate of Capricorn and through the universe and the planets before coming back down to the material world through the gate of cancer. However, this is better understood to the young swedish eye as a gengångare.
Oh Dan... You are so terrifyingly real