the main character was a lion/man. he had his right arm cut off 4 the book started. it was replaced with a mechanical arm. he had two swords that he used (one at a time, not dual wielding). i keep thinking that the book was named, "The Guardian" but I cant seem to find it.
there was another char in teh book named "Opal" who was humanoid yet had iridescent looking skin.
any help is appreciated.
I really want to find this book.