The Amazon Queen of Themyscira and Diana's mother. After meeting the director for the role, Nielsen said, "Patty and I met in London, and we just hit it off from the get-go. We couldn't stop talking. What was supposed to be a one-hour meeting turned into a two-and-a-half-hour lunch and we just really got each other." She described Jenkins's directing style for the film as "She's also the kind of director that I really flourish under. She has very strong and particular and specific ideas about what it is she wants to say. She comes from a place of strength always. And so, when you are dealing with someone like that, you feel absolutely free to be vulnerable, to be creative, and I am a big researcher." On playing the character, Nielsen said, "It was a complete and utter pleasure and I absolutely loved every second of playing her." On her character being Diana's mother and Amazonian queen, Nielsen stated, "I'm queen and I'm preparing my child for a world that entails a lot of responsibility. So it was important to me to bring that into the character." She read The Amazons by Adrienne Mayor to familiarize herself with women warriors and said "I used what I learned in Mayor's book as a rallying cry for how I approached Hippolyta. And then, of course, what is a leader who is elected by her peers every year and has been doing this for a thousand years? That too was interesting to think about". Nielsen went through a workout regimen for the film, saying "I did six hours a day. You know, two hours of weight training, two hours of swords training, and then two hours of horseback riding".
In her debut in All Star Comics #8, Diana was a member of a tribe of women called the Amazons, native to Paradise Island – a secluded island set in the middle of a vast ocean. Captain Steve Trevor's plane crashes on the island and he is found alive but unconscious by Diana and fellow Amazon, and friend, Mala. Diana has him nursed back to health and falls in love with him. A competition is held amongst all the Amazons by Diana's mother, the Queen of the Amazons Hippolyta, in order to determine who is the most worthy of all the women; Hippolyta charges the winner with the responsibility of delivering Captain Steve Trevor back to Man's World and to fight for justice. Hippolyta forbids Diana from entering the competition, but she takes part nonetheless, wearing a mask to conceal her identity. She wins the competition and reveals herself, surprising Hippolyta, who ultimately accepts, and must give in to, Diana's wish to go to Man's World. She then is awarded a special uniform made by her mother for her new role as Wonder Woman and safely returns Steve Trevor to his home country.
Preparing to get Zola back from Hades, Wonder Woman and her male companions sought out Eros in Italy. She hoped that he could lead them to Hephaestus, who might have been able to arm them appropriately for battle with the ruler of Hell. He lead them to Mount Etna, where the blacksmith agreed to arm them. As retribution for his aid, though, Hades sent a monster to kill them all, which had to be dispatched by Diana. Afterwards, Hephaestus armed Diana with new weapons, insisting that she take Eros' guns of love with her to Hell.
Following the events of the Darkseid War, Wonder Woman is told by the dying Myrina Black that on the night of Diana's birth, Hippolyta gave birth to a twin child. This child was revealed to be male, known as Jason, and is said to be incredibly powerful. Wonder Woman makes it her mission to find him. At the same time, she finds the truth behind her origin and history is now cluttered, as she remembers two versions: the pre-Flashpoint one, and the New 52 rendition. She cannot locate Themiscyra or her fellow Amazons and the Lasso of Truth does not work for her anymore.