[Sarah's Knight]

... I thought it was about time that I tried creating a new thread, myself.

Basically, I am looking for some help from other fans of "Air TV" out there, whom might have understood its story better than I did. I liked this series and all, but, there were a lot of things I just couldn't understand. ... I pretty much got lost right at the end of episode seven, where the story seemed to transition without warning over from Misuzu and Yukito to some blue-haired girl with wings and a samurai-like guy who was supposed to be her protector (I think; I can't remember their names). I am guessing that the point in time where the blue-haired winged girl and her protector came in was supposed to be in the past with regard to Misuzu and Yukito's time.

I guess that my specific questions therefore are these:

1) Is Misuzu actually supposed to be an angel, and not a human girl?
2) Who is Yukito, really? And how did his actions seem to depend on whether or not he and Misuzu both lived or died?
3) What was the blue-haired girl and the samurai's relevance to the story?

(warning: biggest spoiler question just below ->)
4) ... Did Misuzu die and go to Heaven at the end? Maybe I am just an idiot, but I didn't think it was made all that clear.

... I would appreciate anyone's help in answering these questions for me. Thank you in advance.