She hesitated to deliver the final blow, standing above him with Luke's lightsaber pointed at his heart. He could feel the indecision and hatred rolling off her in waves. Part of her wanted him dead, but another part couldn't bring herself to take his life; not while seeing him bloodied and beaten, not while he was without the mask. There was something about Kylo's mask that hid any and all humanity he had from her, when he wore it she saw him as nothing more than evil, but without it, he was human, and she struggled with the choice of ending that life. His eyes widened at the realization that she could still be unsure after what he'd done; taking her captive, murdering his own father who she seemed to care for deeply among countless other atrocities he'd committed as a Knight of Ren under the influence of Supreme Leader Snoke.
He didn't get much time to marvel at her web of thoughts, though as the earth abruptly began to crumble and shift between them. A large crevice opened in the earth and Rey took that chance to separate herself from him, jumping cleanly onto the other side of the gap, leaving him bloody, yet still alive in the snow. He picked himself up as he watched her disappear through the trees, fresh blood from the wound on his face clouding his vision and pain shooting through his side from the Wookie's bowcaster.
Rey ran through the towering pines and deep snow as fast as she could, retracing the path she and Ren had taken during their battle. The planet was falling apart, and she had to find Fin and get him to safety. Ren's blood led her through the trees until she spotted Fin ahead, still collapsed and unconscious in the snow. She could hear the whir of an aircrafts engine approaching from just beyond the trees and she hoped it was friendly as she raced over to her fallen friend's body. She knelt beside him in the snow, breathing a heavy sigh of relief as she realized he was still alive.
Through the trees now she could tell it was the Millennium Falcon that was approaching, and she breathed another sigh of relief as she began to reach down to lift Fins body from the snow. She had just slipped her hands under his shoulders when her mind went blank and the world went dark, she hadn't even heard the footsteps that approached her from behind.
He couldn't let her escape, Ren thought; he'd already lost her once and he wasn't about to disappoint the supreme leader with another failure. The crevice was large for sure, but he still had enough energy to power his jump with the force and land safely on the other side. He moved as swiftly and quietly through the trees as he could, following her fresh prints that overlapped with his fallen blood. He could feel her and her emotions – relief mainly, that her friend was still alive – as he got closer, but she didn't seem to sense him. He stood behind her watching as she inspected the deserter, feeling her happiness when she spotted his deceased fathers ship through the trees – still, she did not notice him. Too many other thoughts raced through her untrained mind as he quietly took step after step toward her, until he was close enough to touch her. It was when she went to lift the deserters body that he made his move, using the force and her lack of concentration to send her into a deep slumber. He caught her body as she fell backwards, lifting her in his arms and carrying her away from the falcon and towards the extraction unit he knew was waiting for him.