Yeahhhhh, I can't say I care too much about gloomy girl's back story (and odds are it's not going to be dark enough in a fluff piece like this), whatever her back story is, I doubt there's anything that excuses her being an uber bitch.
I'm intrigued to see where this goes.
And calling it now. The black haired chick the younger brother wants to marry is either an evil THOT or an evil witch.