I am intrigued by Serena's character; she isn't as one-dimensional as one might have thought at first. I sense some deep resentment, and a great deal of strength in her, but as to how she will use it, I'm not sure.
Fred, I suspect, was really rattled by the explosion; it shook the seemingly solid foundation of his power, so he's reverting to the more militant structure that he was always supposed to believe in.
Eden is a wild card; she is trying to do what she was raised to do, but she's been tossed into an utter mess of intrigue and shadows.
And I wonder why Janine is like a cat with 9 lives! She is such a complete screw-up, lovable as can be, but she manages to dodge death constantly, while others who did the same things that did would have been dead last season.