“In the midst of her battle with Superman, Diana realizes that even if she defeats him, he would still remain under Lord’s absolute mental control. She creates a diversion lasting long enough for her to race back to Lord’s location and demand that he tell her how to free Superman from his control. Bound by her lasso of truth, Lord replies, “Kill me.” Wonder Woman then snaps his neck.”
Wonder Woman is and will always been a warrior.
The fact that she’s willing to go that far,—-a distance that neither Superman or Batman is willing to go—- gave her an identity within the World’s Finest Trinity; beyond “female version of Superman”.