While the series has an ensemble cast, some consider Rorschach to be the protagonist as he drives most of the plot forward. In the beginning of the story, he is introduced as the only remaining active masked vigilante not employed by the government. A ruthless crime-fighter, his beliefs in moral absolutism—good and evil with no shades of grey—have driven him to seek to punish evil at all costs. Rorschach's mask displays a constantly morphing inkblot based on the ambiguous designs used in Rorschach inkblot tests, with the mask's black and white coloring consistent with Rorschach's sense and view of morality.