So I actually saw the film 'The Sweet Hereafter' in a film class years before I read the novel, and I think that colors my view of the characters quite a bit. The book is definitely an ensemble piece, but for me, the soul of it is Billy Ansel, the bus driver who loses his twin kids. His sections have this raw, grounded pain that the other, more articulate voices don't quite touch. Mitchell Stephens, the lawyer, feels almost like a force of nature, a storm blowing into town to capitalize on grief, and the way his own family history bleeds into his monologues is quietly horrifying.
Then you've got Dolores Driscoll, the driver who survived the crash. Her guilt is so palpable, even though the novel meticulously avoids placing simple blame. I found Nichole Burnell, the teenager paralyzed in the crash, to be the most complex puzzle. Her testimony changes everything, and Russell Banks writes her sections with this chilling, precocious understanding of power and truth. It's less about who's 'key' and more about how their shattered perspectives form the whole story.