At the end of Gathering Blue, Kira is about to journey with her father to a different town called The Village of Healing. It would mean that Kira would have to leave everyone and everything behind, including her job, Thomas, and Jo. Kira decides that she will stay behind and send her father with Matt, who will be there to travel back and forth between the two towns as the messenger.
Kira believes that, along with Thomas and Jo, they have the gifts to make the town better than it already is. If she left, she would not be able to use her gifts to change the town. Kira wants to use her gifts for the greater good, and once she has completed her goal of changing the town for better, she will then travel to The Village of Healing to be with her father.