- Gilles de Rais, pedophile, child-snatcher and murderer of 80-200 young boys. Took his greatest pleasure in letting his victims know that they were to die.
- Hannibal Lecter, from Red Dragon and The Silence of the Lambs. "You can't reduce me to a set of influences." (The character was unfortunately ruined in the later books.)
- Iago, from Othello. "Demand me nothing. What you know, you know. From this time forth I never will speak word."
- Hunter S. Thompson, American journalist and narcotics lover. Most of Fear and Loathing in Las Vegas was true, you know.
- Q, from Star Trek: The Next Generation. 'He's devious and amoral and unreliable and irresponsible and definitely not to be trusted.'
- Lord Byron, 'Mad, Bad and Dangerous to know'.
- R2D2, from the Star Wars films.
- Tom Bombadil, from The Lord of the Rings.
- Asterix the Gaul.