Wonder Woman was created by William Moulton Marston and Harry G. Peter, and has a lengthy publication history. This history has sometimes included a sidekick Wonder Girl and many villains. Since her debut she has become one of the most popular and recognizable DC Comics characters, along with Batman and Superman. She first appeared in All-Star Comics #8. (1941)
In the following days, Diana soon uncovered Ares, who exposed her to be the God Killer, having been originally conceived to be the ultimate weapon against her brother. Following this revelation, a fierce battle ensued, where Diana fulfilled her purpose in freeing mankind from Ares' influence. The loss of Steve in World War I had left Diana sobered, but she vowed to protect humanity whenever she was needed, albeit in a cautious and distant way.