The Thing Upstairs

The Thing Upstairs is a major but ultimately unseen character in the claymation series, The Trapdoor - an evil and eternally hungry demon The Thing Upstairs is the master of the protagonist Berk and has the monster do all manner of tasks, first and foremost amongst them being feeding him.

The Thing Upstairs resides within a massive and evil-looking castle and as mentioned above the demon is obsessed with eating - however his "food" is often vile and grotesque, such as worms or similar: there have even been occassions where Berk has feed monsters who emerge from the titular Trapdoor to The Thing Upstairs.

The Thing Upstairs is also a slavedriver who has Berk do other tasks around the castle, it is very apparent that Berk fears The Thing Upstairs as every time the demon yells out orders Berk is quick to try and appease him.