Winry is facing Scar again. She's faced him before. She's held that gun in her trembling hands, knowing that he is the murderer of her parents, filled with grief and rage, and determined to pull the trigger. But she couldn't. She couldn't move her finger and send that bullet racing into his heart, couldn't kill him the way he killed her mother and father. And afterwards, she couldn't understand why she couldn't. So Edward gently pried her fingers from the gun, held her hand between his, and told her "Your hands are not hands that kill others. They're hands that give life to others." She heard the words and knew they were true, but she just couldn't comprehend them through the pain, so she clung to his coat and sobbed into his chest. And when he left she sat there, that same coat wrapped around her shoulders, the words echoing in her ears.
And now she's facing Scar again. Months later. This man who slaughtered the people that had saved his life, her parents, who has killed countless more, and has tried so many times to kill Edward and Alphonse, the only family she has left. He's trapped. He's helpless. They could end him right there. She wants to confront him, and everyone is afraid to let her. They all remember the gun, and Ed remembers her tears. But she steps forward anyways, and her sad blue eyes stare straight into his tortured, hatred-filled red ones. She opens her mouth and asks him why he killed her parents. He has no reason for her, only defiance and a readiness to be judged, for her to take up the gun again and shoot him through the heart without hesitation. Winry could do that, so easily. It would make so much sense. And Ed's face would be stricken and maybe he would never look her in the eyes again, and Al would tremble, but the rest of them would understand. There would be no blame on her. Even Scar would not blame her.
But that is not what she wants. That is not what her hands are for. So instead, she looks at his wounds and says "You're going to bleed to death if we don't do something." and kneels before him to bind them. And it is he that is stricken, and they are all shocked. But her parents healed him. Her parents gave this man his life back, and even if he ended theirs, how could she take back their last act?
"You're forgiving me?" He asks. She ties the cloth around his blood-soaked arm.
"I am not forgiving your wantonness." she says, standing up. But Edward was right. Her hands are those that give life to others. And as she looks into Scar's red eyes again, she can see that she has healed wounds deeper than his flesh.