From RHJunior Comics Wiki
Kestrel, sometimes addressed as Kes, is one of Quentyn's two best friends. Since the eventful Choosing Day when she, Fennel, and Quentyn chose their careers, she has mostly been in Sanctuary City studying to become an artificer. She and Quentyn got to spend some time together there when he brought Wildcard to Headmaster Irons to be studied. There was almost some romance with Quentyn at Last Harvest, but sorry, fans - it just didn't get there.