Scientist Jon Osterman gained power over matter when he was caught in an "Intrinsic Field Subtractor" in 1959. Doctor Manhattan was based upon Charlton's Captain Atom, who in Moore's original proposal was surrounded by the shadow of nuclear threat. However, the writer found he could do more with Manhattan as a "kind of a quantum super-hero" than he could have with Captain Atom. In contrast to other superheroes who lacked scientific exploration of their origins, Moore sought to delve into nuclear physics and quantum physics in constructing the character of Dr. Manhattan. The writer believed that a character living in a quantum universe would not perceive time with a linear perspective, which would influence the character's perception of human affairs. Moore also wanted to avoid creating an emotionless character like Spock from Star Trek, so he sought for Dr. Manhattan to retain "human habits" and to grow away from them and humanity in general. Gibbons had created the blue character Rogue Trooper and explained he reused the blue skin motif for Doctor Manhattan as it resembles human skin tonally, but has a different hue. Moore incorporated the color into the story, and Gibbons noted the rest of the comic's color scheme made Manhattan unique. Moore recalled that he was unsure if DC would allow the creators to depict the character as fully nude, which partially influenced how they portrayed the character. Gibbons wanted to be tasteful in depicting Manhattan's nudity, selecting carefully when full frontal shots would occur and giving him "understated" genitals—like a classical sculpture—so the reader would not initially notice it. Laurie Juspeczyk / Silk Spectre II The daughter of Sally Jupiter (the first Silk Spectre, with whom she has a strained relationship) and The Comedian. Of Polish heritage, she had been the lover of Doctor Manhattan for years. While Silk Spectre was originally supposed to be the Charlton superheroine Nightshade, Moore was not particularly interested in that character. Once the idea of using Charlton characters was abandoned, Moore drew more from heroines such as Black Canary and Phantom Lady. Walter Joseph Kovacs / Rorschach A vigilante who wears a white mask that contains a symmetrical but constantly shifting ink blot pattern, he continues to fight crime in spite of his outlaw status. Moore said he was trying to "come up with this quintessential Steve Ditko character—someone who's got a funny name, whose surname begins with a 'K,'