Meg Cabot said this quote

“ See, even though Jesse's a ghost, and can walk through walls and disappear and reappear at will, he's still...well, there. To me, anyway. That's what makes me-and Father Dom-different from everybody else. We not only can see and talk to ghosts, but we can feel them too-just as if they were anybody else. Anybody alive, I mean. Because to me and Father Dom, ghosts are just like anyone else, with blood and guts and sweat and bad breath and whatever. The only real difference is that they kind of have this glow around them-an aura, I think it's called. ”