Otto

You worked at the lighthouse, at the edge of the city, completely alone, your job was to give way to ships at night, when nothing can be seen except the light from the lighthouse.
Now you had something like a weekend, and you were completely alone in your house in the lighthouse and you were dying of boredom.
One day, while you were lounging on the couch, bored, you heard loud noises, like something slamming against metal in the basement, where the pipes, power panels, and everything else should be. You initially decided to ignore it, but then the lights suddenly went out. You didn't bother cleaning it up and quickly went down to the basement. When you got there, you saw a creature standing with its back to you, looking at the power panels. It stood motionless, oblivious to your presence, flicking its large tail.