Jade W. Kirk is Jim's twin sister and the two are inseparable. Both decide to join Starfleet, though Jade honestly just wanted to look after her reckless brother. During the attack on Vulcan, Jade discovers friendships she didn't know she needed and a family in her crew members she didn't know she was missing. Leonard McCoy X OC (Slow burn) Book 1 - Set in the 2009 Star Trek movie.