(I'm not certain if this belongs in plot or character planning; I apologise if it requires relocating.) I'm about to pick up work on a novel again. Since the first rambling, just-for-fun draft, I've developed the three major characters and determined the scope of what happens over the course of the book. One of the three characters is not "on screen" for a large amount of time, so they aren't an issue; the other two are the main protagonists and the story is told from their perspectives. One has a very flamboyant personality and so tends to dominate the scenes and make most of the story happen, while the other character is much more passive. While the flamboyant character is in some ways a stronger presence in the narrative, the book is really about the passive character and their gradual changes in perspective and growth as a person. (I should also mention that much of the passive person's change is brought about by their exposure to the other protagonist.) Here is my question: Does it cause imbalance to the story if one person has serious development while the other remains majorly unchanged? Should I examine my better-adjusted character and explore possibilities for their change or growth within this same book? Or will it work to focus more on the story I'm ready to tell and allow the other character to simply be a part of that, albeit a very important one?