The first thing Sujin taught me was how to use my fingernails. “You can blind someone, or punch a hole in their throat, if you want. But you have to keep your nails the optimal length and thickness, so that they don’t break at a critical moment.” She examined mine and shook her head. “Yeah, these won’t do,” she said, prescribing nail-strengthening vitamins and a particular brand of thickening polish.
