Harbinger is a bit of a tonal shift from the The Fallen. Where The Fallen had a split feel between Chavali’s life with her clan and then after her death as one of the Fallen, Harbinger is almost entirely concerned with a single mission she’s sent on on behalf of her former masters.
We still have hints of Chivali’s former life. How she uses her powers; occasional sad memories of all she’s lost. But for the most part, she seems to be fitting into her role as something like a spy, running missions for the masters of the Fallen. It works, although I was hoping for a bit more even about the clan she’d lost, perhaps rebuilding it, and why it happened to them in the first place. We get a few answers, but really more questions than ever.