Really great character you have there. Definitely feeling a strong personality. Environments are fun, but if you do any more zoom in a bit as these feel a bit empty since they are all viewed from far back, without an exaggerated scale, of elements very close to the viewer creating more of a foreground, middle ground, background sort of deal. They communicate what you want aesthetically and concept wise, but pushing those relationships would boost their dramatic qualities. Keep it going though, your story is really starting to look good.
Thanks for the advice Mike, I'll definately play around with more foreground elements for the final environments.