In the Dave Gibbons and Alan Moore masterpiece of graphic novels Watchmen, Rorschach is a vigilante in New York City. He wears a mask of a special fabric (a "Dr. Manhattan spin-off") that contains a fluid trapped between layers of latex. The fluid creates black and white patterns on the mask; the two never mix, and are always symmetrical, as in a Rorschach Blot.

He is one of the most, if not the most complex characters in the book; indeed, its structure could be said to have been based around him. He has no superhuman powers, just natural agility and gymnastic ability, along with absolute rage at injustice and abuse.