How we cite our quotes:
I stared without breathing across the long room, into the dark eyes of the hunter, and he looked pleasantly back at me. (Preface.2)
The novel opens with a frightening scene, setting the tone for the story.
[Edward to Bella:] "Do you think I could be scary?" (5.281)
Edward can't read Bella's mind, but he seems to be trying to find out what she thinks of him. Does she like him? Does she think he's scary? Would her family approve of him? Keep in mind that at this point, Bella doesn't know that Edward is a vampire.
There was one thing I was sure of, if I was sure of anything. The dark Edward in my dream last night was a reflection only of my fear of the world Jacob had spoken, and not Edward himself. Even so, when I'd screamed out in terror at the werewolf's lunge, it wasn't fear for the wolf that brought the cry of "no" to my lips. It was fear that he would be harmed – even as he called to me with the sharp-edged fangs, I feared for him. (7.60)
Even though she thinks he is likely dangerous, and probably a vampire, Bella cares more about Edward's safety than her own.