BATTLE Ruby/Sam/Samcifer/Dean/Deanchael
She couldn't walk away. Oh she probably should have, and she knew on some level Sam was in there screaming at her just to go but she needed to be here. She needed to see this through because she loved him and because this thing before her was the being she had feared and loved for so long. And all she could do was stand there, hold her ground against the worst of evils but she was doing this for Sam, for their family, and yeah on some weird level where she cared about people, probably even for the world.
She was terrified. But right then she was probably less than sane. So she shook her head. Refused to move.
"No, no, he tried to stop you and he failed, its my turn now, my turn to give him strength to fight just a little bit more. My turn to remind him no matter how dark and cold it might be where he is that he needs to look at me, look at Dean, and remember that there are people that love him. He needs to rememeber Emily. His little girl, our Princess, right? Come on babe I know you're still in there."
Ruby wouldn't talk to Lucifer, she was done with that. She wouldn't listen to his lies or his tricks. She'd focus on her husband no matter what came next.