Scars.

Damage she 'd inflicted on herself in the name of experiments. Her arm was so small and he hadn 't been able to see a single spot of undamaged skin.

Jinshi couldn't get the image out of his mind. He hadn't been prepared for just how bad it was. He 'd spent so much time wondering what was under the wrap she always wore, and now he knew.

She 'd acted like it was completely fine. Not only that, she 'd seemed genuinely surprised that he 'd been so horrified. He supposed he should be grateful she 'd contained her experiments to that one arm. Still, he hated how recklessly she treated her body when it came to her obsession with poison. All he wanted was to protect her, but that got significantly more tricky when she was a danger to herself.