The Dragon

The Big Bad needs a Number Two; this would be the Evil Counterpart of that (or The Lancer). He's the main villain's right-hand man, his closest confidant (or something akin to it), frequently acts as his Foil, and may be seen working as the front-liner of the evil forces to personally carry out his master's orders as one of his most dangerous and competent subordinates. A Big Bad and a Dragon aren't a Big Bad Duumvirate, as this would require them to be on equal footing for it to apply. Though a Duumvirate can have one or more Dragons of their own. For literal dragons and their permutations, see Our Dragons Are Different. Not to be confused with Dragon Lady, who is more likely to be a Big Bad than the Dragon, or Dragon, which was a magazine. Definitely not to be confused with Savage Dragon.