The Purple Man

Purple ManReal Name: Zebediah Killgrave

The Purple Man’s body  produces pheromones which allow Killgrave to control others by verbal suggestion so long as he is present.   Killgrave can control the effect, so that he can either hide in a crowd, or control the entire crowd.   When he departs, the victims slowly regain self-control.  The strong-willed. like Dr. Doom, have shown that they can overcome the compulsion, but that is exceedingly rare.