His cruelty was less a reputation and more dark whispers in the corner. Many more believed his reputation mostly to be a sexual one and less spoke of his actions toward them while giving into the first reputation. Even amongst a circus such as the one they lived in, what happened behind closed doors could still be kept a secret. But then, the good doctor had more interactions with his outcomes than the acts.
Byron did not know much of the Doctor, beyond her beauty- which honestly was what Byron cared about right below what one's blood might taste like. He knew she was different and not human. Byron could smell that much, but he had not expected her to shift. Stepping back in surprise, Byron let go of the girl as well. The girl momentarily stunned herself.
Such a cold exterior did nothing when a vampire could hear the beat of one's heart. A grin spread across his features. Grabbing the girl once more he snapped her neck, done with that game and far more interested in Rose now. "Hmmm, Maybe after the Hunt I'll need to visit you more often." He winked at her. "The girl got her quick death, I think that kiss is due."