Marvel: Pheromonal Mind Manipulation

Kara Killgrave (Purple Woman)
She can control a person through the use of pheromones, placing them in an extremely suggestible state wherein they will follow her every command - initially verbal, but later extending to gestures too. As a side-effect, and unlike her father, those under her control have their skin turn the same shade of purple as her, an effect which ends when they are released. She cannot order someone to control a bodily function they are incapable of consciously controlling at normal times, such as their heart rate.

To prevent being controlled by her, a person must either create or utilize a physical barrier between her and themselves, or continuously rinse the pheromones off of their skin before they can take effect.