The mouth, so far as I could see it under the heavy moustache, was fixed and rather cruel-looking, with peculiarly sharp white teeth. These protruded over the lips, whose remarkable ruddiness showed astonishing vitality in a man of his years.

– Bram Stoker

Dracula, Chapter 2. Introducing the Count! Jonathan Harker’s physical description of Dracula on his first encounter with him at the castle is of a sinister, frightening character. There is also a hint of the supernatural, in the "sharp white teeth" and "astonishing vitality" of Dracula.