Sophronia is a character who is dreadfully curious about the world, but suffers from the societal restrictions of being a girl.
With respect to the story, I love the twists he puts on both Snow White and Sleeping Beauty.
I love that Neil Gaiman the Snow White fairy tale it on its head. The queen is a tragic heroine.
I love that this is a fairy tale retelling, complete with cruel stepmother and stepsisters, dead father, but set in a future dystopian world. Cinder is a cyborg, meaning she is missing her foot and hand, and has implants all over her body. In this world she is a disposable citizen, made more so because of the plague that ravages the world.