The "Diana Prince" identity has been part of Wonder Woman's history since her comics debut in 1941. In the early Golden Age stories, Wonder Woman served as a military secretary during World War II, using Prince as her cover. Later occupations Wonder Woman performed as Prince included translator at the United Nations, Air Force captain and ambassador, and in the '70s TV series, Lynda Carter's Wonder Woman used Prince to serve as an agent of the Inter-Agency Defense Command. In the DC Extended Universe, Prince works as curator for the Department of Antiquities at the extremely prestigious Louvre Museum and is held in very high esteem by the curator of the Gotham City Museum of Antiquities. Her tremendously long life span, accumulation of immense amount of knowledge and exceptional perceptiveness makes Diana Prince the wisest and most emotionally-intelligent member of the Justice League.
Wonder Woman was soon faced with a new threat. Some years ago, Diana saved a young girl, Vanessa Kapatelis, from death at the hands of Major Disaster. She continued to visit Vanessa for many years as she recovered from her injuries, and encouraged her to undergo experimental treatment involving nanites, which allowed Vanessa to walk again. Eventually, Wonder Woman's superheroics forced her to cease her visits. During Diana's absence, Vanessa's mother Julia died, and Vanessa was left alone and felt that Diana had abandoned her. She began to resent Wonder Woman and declared herself her enemy, using the nanites in her blood to create a metallic, winged suit of armor and adopting the name Silver Swan. Silver Swan murdered a family of people that Diana had recently saved, causing Wonder Woman to fight her alongside Jason. Diana managed to drown Silver Swan until she lost consciousness, causing her to revert to her human form. She left Vanessa to recover in the care of A.R.G.U.S.
“Noted Psychologist Revealed as Author of Best-Selling ‘Wonder Woman,’” read the astonishing headline. In the summer of 1942, a press release from the New York offices of All-American Comics turned up at newspapers, magazines and radio stations all over the United States. The identity of Wonder Woman’s creator had been “at first kept secret,” it said, but the time had come to make a shocking announcement: “the author of ‘Wonder Woman’ is Dr. William Moulton Marston, internationally famous psychologist.” The truth about Wonder Woman had come out at last.
At the end of Infinite Crisis, Wonder Woman temporarily retires from her costumed identity. Diana, once again using the alias Diana Prince, joins the Department of Metahuman Affairs. Donna Troy becomes the new Wonder Woman and is captured by Diana's enemies. Diana then goes on a mission to rescue her sister, battling Circe and Hercules. Diana defeats the villains, freeing Donna and takes up the role of Wonder Woman again. Circe places a spell on Diana, which renders Diana into a normal, powerless human being when in the role of Diana Prince; her powers come to her only when she is in the role of Wonder Woman.
She is able to astrally project herself into various lands of myth. Her physical body reacts to whatever happens to her on the mythical astral plane, leaving her body cut, bruised, or sometimes strengthened once her mind and body are reunited. She can apparently leave the planet through meditation and did this once to rescue Artemis while she was in Hell.
In one episode, a newspaper editor named Brown, desperate to discover Wonder Woman’s past, assigns a team of reporters to chase her down; she easily escapes them. Brown, gone half mad, is committed to a hospital. Wonder Woman disguises herself as a nurse and brings him a scroll. “This parchment seems to be the history of that girl you call ‘Wonder Woman’!” she tells him. “A strange, veiled woman left it with me.” Brown leaps out of bed and races back to the city desk, where he cries out, parchment in hand, “Stop the presses! I’ve got the history of Wonder Woman!” But Wonder Woman’s secret history isn’t written on parchment. Instead, it lies buried in boxes and cabinets and drawers, in thousands of documents, housed in libraries, archives and collections spread all over the United States, including the private papers of creator Marston—papers that, before I saw them, had never before been seen by anyone outside of Marston’s family.
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.
Trudging on, Hades expects their presence and tries sending spirits in order to stall and attack Diana and Hermes. Successfully defeating them, they wonder through a forest and find a cabin resembling Zola's farm house. Zola pops out and happily hugs Wonder Woman. Hades at that moment makes his grand entrance and frees them. Though, just before they escape, Hades beckons Wonder Woman to look behind, and shoots her with Eros pistols. She urges Hermes and Zola to leave while she is left at the mercy of Hades who wants her to be his bride. Here, she is preparing to wed Hades when she gives Diana her lasso, saying that if he truly loves him, she will confess it due to the properties of the lasso. She says yes, but will not go on with the wedding as it is more or less forced and not real love. She escapes his clutches and shoots him as a means of payback for shooting her.