Lucy Grey? It’s supposed to be a critical piece, so “connecting” with the characters isn’t really the point. But there are certain moments you can connect with despite Snow being a bad person. Losing family, choosing between a lover and your friends, choosing between doing the right or wrong thing, etc. It doesn’t tell you exactly how to feel like the other books. That’s the point.
Even though we never really saw or got any character development with those characters in sunrise? Only Maysilee got any development or real attention in the story. They were throwaway characters with not much substance. I read all the books for the first time all in a row and found the last to be the weakest writing wise. Imo ofc.