I read it over twenty years ago. It’s a fantasy and I don’t remember much of the romance elements though I know there was one (that wasn’t my thing then). The heroine doesn’t have fingernails, but she does have retractable claws that come out of her fingertips. Her mother was called a soul dancer, someone who had the ability to pull the soul out of a person by dancing in front of him/her. The heroine has the same gift and the villain wants to use her. I don’t remember anything about the hero, other than she pushes him away, afraid she’ll take his soul. One of the secondary characters is carrying around the bones of a lost child in his backpack. Some ritual needs to be performed before a person can depart from earth so the shadow of this ghost child is accompanying him everywhere. This man’s best friend, a woman, dies during battle and I remember the scene where she looks at him during a lull in the battle and tells him she’s been dead three days but she didn’t want to leave his back unguarded.
I think the cover had a picture of the woman with claws and she was standing next to a panther-like creature.
I really want to re-read this book. I hope someone knows the name of it.