He actually wasn't making her bleed, but it was nice. Saerian smiled before Jo shattered the mirror. Then he carefully moved the shards of glass out of his way so he could come through it, into the room with her, right arm, then left arm, then torso, then entire body. He half-fell onto the floor, then stood up to full height with a slight smile.
Get out of my head!
He shook his head. "I can't do that," Saerian said. "Y'see, that's just not how I roll."
He looked at her wrist, at the blood flowing onto the floor. Saerian's fangs were already present, always present. His eyes changed, slightly--the way Phaedra's did. Instead of becoming a more feral green, they became a more transparent blue.