Amelie hates Rochester because he is white, if you write from her perspective racism will have to be a major theme in your story. She also despises Antoinette because of her mixed race and doesn't accept Antoinette's superior attitude (Amelie is of mixed race herself, but her features are darker and more prononced). Antoinette can pass for a white woman, Amelie can't. She even argues, fights, and calls Antoinette a "white cockroach," something we don't generally see in a servant's relationship with her mistress.
So, if you're going to use Amelie as a main character, what are you going to do with her? She doesn't have a large part; we don't know much about her; and she's going to need some background in order to come center stage. Who were her parents, what sparks her jealousy of Antoinette, why did she accept money from Rochester after their encounter? Does she simply hate Rochester because he is white or because he married a girl for the money she'd afford him....... later disgusted by his rash decision and the fact he married a girl with what he called "bad blood"?