Traitor

A traitor is an individual who betrays his or her allies, whether for personal gain or some other factor. Treachery is often considered one of the most evil of traits in a villain due to the fact that a traitor is hard to trust. After all, any character who is ruthless enough to betray friends and allies is more than ruthless enough to be a threat to anyone else. This category applies to villains who have betrayed the heroes or their fellow villains to achieve their goals.