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".
While Superman watched out for Zod, Diana visited the deserted Themyscira to speak to her mother, still a clay statue. In her absence, a demon from Tartarus had escaped from its prison and roamed free on the island. Wonder Woman destroyed the creature and sealed the gates to Tartarus with her lasso. Leaving the island, she received word from Batman that Superman was engaging Zod and Faora in battle. Reaching Superman’s side, Wonder Woman steadily overwhelmed Faora until Zod threatened Superman’s life. Wonder Woman was forced to let the criminals go.
Lennox suggests meeting Siracca, a fellow demigod daughter of Zeus as well. She travels to Lybia and finds a girl trapped in a vase. The girl tells Wonder Woman that when the soldiers came, everyone hid in a bunker. Leading her down, she triggers a trap which sends a plethora of knives, swords and daggers at her. Blocking them all but one, Diana looks to find the girl dissolving to sand. Crying at her failure, her time to mourn is cut short as the real Siracca, albeit in a zombie like form, ambushes her.
Wonder Woman is one of the students nominated to be Hero of the year, with everybody believing she will actually win the prize. When Big Barda accidently breaks Wonder Woman Shield, she (With Supergirl, Batgirl and Bumble Bee) travels to Themyscira to repair it. Her friends meets her mother, Queen Hippolyta, who is overly proud of her, having rooms devoted to her daughter trophies. After rescuing a captive Hyppolita, Wonder Woman goes back to Super Hero High to fight Eclipso. When Eclipso retrieves to the moon, Supergirl and Wonder Woman travels there and together managed to defeats the enemy. After Bumble Bee win the Hero of the Year award, Wonder Woman asks Hippolyta if she is not dissapointed by her, but her mother replies that she cannot be more proud. She is voiced by Grey DeLisle.