The Monster is a legend of Castle Finster.
Castle Finster has supposedly had a legendary monster since the 16th Century when Else Amsel disappeared from the castle. Since then, it has been half a force to be reckoned with and half a source of entertainment, with an alert system and special instructions for staff members when it comes to dealing with monster sightings, but also with a yearly festival to celebrate the lack of its presence.
In 2011, Anja Mittelmeier dresses up as the monster in order to scare the villagers and prepare them for the final show, in which she would kill a young woman in order to make it look like Markus Boehm arranged it and ruin him. Lukas Mittelmeier even tries dressing up as the monster at one point.