The chief chemist associated with General Ludendorff who specializes in chemistry and poisons. On her role, Anaya said, "Well, it was a small role in this big ensemble, but it is an important character in the story. I'm going to be a big nightmare" for Wonder Woman and Steve Trevor. Describing her character, Anaya said, "Dr. Maru loves rage and enjoys people's pain. She's creating terrible weapons, and her purpose in life is to kill as many people as possible, and provoke as much pain as possible". She researched World War I and Fritz Haber, the scientist who created mustard gas, to prepare for the role. On the character's facial scars, Anaya stated, "I went to Patty Jenkins and asked, 'What happened to her?' And she said, 'She did it on purpose.' I was like, 'What? Patty, you're going further than I ever imagined.' She said, 'She wants to provoke painful suffering, so she tested her own gas on her own face. She wanted to know how deep this form of her gas would go, so she put it on her own face.' You can see half of her face is completely gone. This is the sadistic side of Dr. Maru". She also stated her character "is quite the opposite to the lead role of this movie, one of the strongest characters ever of DC comics, Wonder Woman. I can tell you that Doctor Poison is someone with a capacity to provoke so much pain." On Dr. Maru's relationship with General Ludendorff, Anaya said, "I think that they have a relationship based on loyalty. Ludendorff is a very tormented General that lacks self-confidence. That's why, in part, he takes these drugs that Dr. Poison gives him. They are from different worlds, but they complement each other".
Wonder Woman's supporting characters were altered as well. In addition to the introduction of the Kapatelises, Steve Trevor was changed into an Air Force officer considerably older than Diana, thus sidestepping the traditional romance between the two. Instead, Trevor became involved with Etta Candy, a mature military officer possessing a plump physique. The Greek war god Ares and the witch Circe eventually became two of Diana's greatest enemies. Her rogues gallery included the Cheetah, a woman who could transform into a ferocious feline-humanoid creature; and the Silver Swan, a once-deformed radiation victim granted beauty, wings and deafening sonic powers through genetic engineering.
Marston was a man of a thousand lives and a thousand lies. “Olive Richard” was the pen name of Olive Byrne, and she hadn’t gone to visit Marston—she lived with him. She was also the niece of Margaret Sanger, one of the most important feminists of the 20th century. In 1916, Sanger and her sister, Ethel Byrne, Olive Byrne’s mother, had opened the first birth-control clinic in the United States. They were both arrested for the illegal distribution of contraception. In jail in 1917, Ethel Byrne went on a hunger strike and nearly died.
“I have the good Sergeant’s letter in which he expresses his enthusiasm over chains for women—so what?” As a practicing clinical psychologist, he said, he was unimpressed. “Some day I’ll make you a list of all the items about women that different people have been known to get passionate over—women’s hair, boots, belts, silk worn by women, gloves, stockings, garters, panties, bare backs,” he promised. “You can’t have a real woman character in any form of fiction without touching off a great many readers’ erotic fancies. Which is swell, I say.”
“As to the ‘advanced femininity,’ what are the activities in comic books which women ‘indulge in on an equal footing with men’? They do not work. They are not homemakers. They do not bring up a family. Mother-love is entirely absent. Even when Wonder Woman adopts a girl there are Lesbian overtones,” he said. At the Senate hearings, Bender testified, too. If anything in American popular culture was bad for girls, she said, it wasn’t Wonder Woman; it was Walt Disney. “The mothers are always killed or sent to the insane asylums in Walt Disney movies,” she said. This argument fell on deaf ears.