Test Subject?

Cerberus didn't notice Scylla until she was tumbling into his cell from a hole high near the ceiling. He had caught the little flash of her blue body falling, but it was the thud that got his attention the most. Her cry sent him over to her quickly, grabbing her under her rib cage to pull her into him to comfort her. He tried to wipe away the goo that had made a mess all over her face and neck with his own injured paw, the wound he had nearly blistered by rubbing his paw pads across it over and over again while in the cell.

"Are you alright?" He questioned her, not expecting her to resist him. The glow inside his paw slowly retracing the beat of his heart which was still as calm as ever despite the condition of his sister.

"Cerberus Klein"