Diana of Themyscira

Born millennia ago on to the hidden people of the Amazons on the island of Themyscira, Diana was sculpted out of clay by Hippolyta and brought to life by Zeus. 
Trained by the warrior women to fight with strength and honor, but to cherish peace above war, Diana would become the best fighter and leader in the history of the Amazonians of Themyscira. When a warrior from the world of man inadvertently crashed into their island in the midst of World War I, Diana was chosen to take him back to the front lines.
Now caught in the conflict of the mortal world, Diana would choose to help fight on the side of the allies to secure peace across Europe. Diana and Steve developed a romantic relationship, but, ultimately, Steve died preventing serious civilian casualties. 
After consulting with Hippolyta and the goddess Hera, Diana decided to stay on Earth as the Wonder Woman, actively preventing war and catastrophe through both combat and diplomacy.
Over the course of the 1930s, Diana fought on the European front in World War II, before ultimately stepping out of the conflict to join the Justice Society stateside in the early forties. 
After the team was sent forward without her to the 1980s, Diana would continue to fight crime through the decades, at one point even briefly losing her powers in the 1970s. When the team re-emerged, they re-assembled to defeat a worldwide threat the likes of which had never been seen by the modern western world. By 1990, the team had disbanded as many of them had a falling out and had grown older. Diana continued to use her powers for good, but gradually kept a lower profile until the dawn of the new millennium. At one point the Society was sent forward to the 1980s, and Wonder Woman continued to fight crime as she waited to re-join them, arrived, they collaborated once more to prevent a world wide catastrophe the likes of which the modern western world had never seen.
B
inadvertently crashed into their island in the midst of World War I, Diana was chosen to take him back to the front lines, by participating in a Battle contest Hippolayta had forbade.
Notable friendship with J'onn as near immortals