Aim for his legs

As she shot forward, Shiki suddenly ducked down and swiped for his legs. Time seemed to slow down, as she watched his arms have to readjust to her sudden and quick movement. However, he was far too slow to even grasp at her, as her knife already started to touch the skin of his legs, tracing along one of the lines of death. It cleaved through like butter, tearing off the man's right calf from the rest of his leg. He fell and tumbled to the ground, screaming out in pain as he reached to grab at his dismembered leg. Shiki followed it up with his left as well, tearing it all off from the thigh down. Now, without his legs, he was left only with his arms. Not taking any chances, She quickly followed up cutting off his left and right arms, before ending his life, tearing the knife down into his skull.

Panting, she stumbled, and fell back on her butt, looking at the body of the man with the dull knife now lodged inside of his head. It was stuck in there good, and she doubted she had the strength to try and pull it out. As for whether or not she felt that she had become a killer... she didn't know. But a killer murders a human being, and this person... was more of a monster then a human.

For now, she ignored the conflict of spilling this despicable man's blood, and looked around to get out. The door he had come through seemed to be the only way, even if it was still in the perimeter of the warehouse. It did lead outside, but she had seen the area surrounded with a tall fence, and lights.