“i am always pitted against the hero. to stop him at all costs is my only goal.” which type of character does this describe? shadow trickster herald mentor

Shadow is the only answer that really fits. Hope that helps.

Shadow

Explanation:

The shadow character is called the character that is the villain in the story, is the one that serves as an antagonist for the hero of the story, and he tries by all his means to stop him and to make him suffer, he doesn´t always has to be a character, it could be destiny, or a force, or a spirit, or bad fortune but the point that this entity is always trying to stop the hero from succeding.

adbusters is an oppressive not-for-profit organization, founded in 1989  determined to end capitalism. the goal is to  spread their message through a self published magazine (which contains no advertisements). the likely reason why adbusters publishes a magazine with spoof advertisements is that  adbusters wants to encourage consumers to think critically about ads. 

i think it is a female.