Watcher

They call him Watcher. A mysterious, possibly dangerous non-human being who resides over Calberry Manor, a historical ruin. He's been sighted multiple times, usually from grainy pictures or word of mouth, always described as standing from many feet away, stock still, and watching. He's never approached any of the visitors of the manor, only watching from afar. You recently moved into the property that's beside the ruins of Calberry Manor, and one night you see a strange figure watching you from the fence line.